How to Detect & Remove W32.Backdoor.j
What's W32.Backdoor.j?
W32.Backdoor.j is a “threat” that appears on the websites and security scans of fake antispyware XP Antivirus Protection, AKA XP Antivirus 2008.
And why is W32.Backdoor.j dangerous? Only because W32.Backdoor.j might scare you into wasting $49.95 on XP Antivirus.
Unless you like getting ripped off, don’t download the software the W32.Backdoor.j popup links to. You’re not really infected with W32.Backdoor.j — you’re infected with scamware that you need to remove.
I’ll show you how to get rid of W32.Backdoor.j and XP Antivirus 2008, for free.
Do I Have W32.Backdoor.j?
You can search your computer manually, but it might take hours to find W32.Backdoor.j’s hidden files. To save time, I recommend you automatically scan your PC for W32.Backdoor.j and other spyware. Why not? It’s free.
Free W32.Backdoor.j Scan, with SpyHunter
You can easily detect W32.Backdoor.j with SpyHunter’s FREE spyware scanner. And if you’re really infected with W32.Backdoor.j, you can buy the full version of SpyHunter to remove W32.Backdoor.j and other spyware. Or you can use my instructions below and remove W32.Backdoor.j for free.
I’m a big fan of SpyHunter. Here’s why: SpyHunter offers live support on the phone, and if SpyHunter doesn’t automatically remove W32.Backdoor.j, you can get a custom fix for your computer.
How to Remove W32.Backdoor.j
Your best protection against W32.Backdoor.j is to remove W32.Backdoor.j processes, registry keys, DLLs, and other files ASAP.
Get Rid of W32.Backdoor.j Manually
Manual removal of any spyware can be difficult. When you manually remove W32.Backdoor.j, you have to fiddle with your registry and risk destroying your PC. It’s highly recommended you use an automatic spyware scanner to make sure you’re infected with W32.Backdoor.j. Also, I recommend you backup your system any time before editing your registry.
To remove W32.Backdoor.j manually, you need to delete W32.Backdoor.j files. Not sure how to delete W32.Backdoor.j files? Click here, and I’ll tell you. Otherwise, go ahead and…
Block W32.Backdoor.j sites:
Remove W32.Backdoor.j processes:
xpantivirus.exe
download.exe
%program_files%\xpantivirus\sysbackup\ntoskrnl.exe
install_xp.exe
%program_files%\xpantivirus\sysbackup\ntoskrnl.exe.md5
%program_files%\xpantivirus\sysbackup\explorer.exe.md5
%program_files%\xpantivirus\unins000.exe
xpantivirusupdate.exe
%program_files%\xpantivirus\sysbackup\explorer.exe
%program_files%\xpantivirus\unins000.exe
install_xp.exe
%program_files%\xpantivirus\xpantivirusupdate.exe
%program_files%\xpantivirus\sysbackup\ntoskrnl.exe
%program_files%\xpantivirus\sysbackup\explorer.exe
%program_files%\xpantivirus\xpantivirus.exe
%program_files%\xpantivirus\xpantivirus.exe
Delete W32.Backdoor.j DLLs:
%program_files%\xpantivirus\sysbackup\shlwapi.dll.md5
%program_files%\xpantivirus\sysbackup\shlwapi.dll
%program_files%\xpantivirus\sysbackup\wininet.dll.md5
%program_files%\xpantivirus\sysbackup\wininet.dll
%program_files%\xpantivirus\sysbackup\shlwapi.dll
Remove W32.Backdoor.j registry values:
HKEY_CURRENT_USER\software\xp antivirus\options lastscan
HKEY_CURRENT_USER\software\xp antivirus\options afterregisterurl
HKEY_CURRENT_USER\software\xp antivirus\options autoscanonstartup
HKEY_CURRENT_USER\software\xp antivirus\options
HKEY_CURRENT_USER\software\xp antivirus\firstrun
HKEY_CURRENT_USER\software\xp antivirus\options helpurl
HKEY_CURRENT_USER\software\xp antivirus\options labelurl
HKEY_CURRENT_USER\software\xp antivirus\options minimizetotray
HKEY_CURRENT_USER\software\xp antivirus\options offsiteurl
HKEY_CURRENT_USER\software\xp antivirus\options programversion
HKEY_CURRENT_USER\software\xp antivirus\options startwithwindows
HKEY_CURRENT_USER\software\xp antivirus\options totalscans
HKEY_CURRENT_USER\software\xp antivirus\options transactionkey
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\xpantivirusfilter displayname
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\xpantivirusfilter errorcontrol
HKEY_CURRENT_USER\software\xp antivirus\options firstrunminimize
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 inno setup: user
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 installdate
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 installlocation
HKEY_CURRENT_USER\software\microsoft\windows\currentversion\explorer\menuorder\start menu\programs\xp antivirus
HKEY_CURRENT_USER\software\microsoft\windows\currentversion\run xp antivirus
HKEY_CURRENT_USER\software\xp antivirus\options autoupdate
HKEY_CURRENT_USER\software\xp antivirus\options billingurl
HKEY_CURRENT_USER\software\xp antivirus\options enableantirootkit
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 urlupdateinfo
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\xpantivirusfilter
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 displayname
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 helplink
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 inno setup: app path
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 inno setup: icon group
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 inno setup: setup version
HKEY_CURRENT_USER\software\xp antivirus\options firstrunurl
HKEY_CURRENT_USER\software\xp antivirus\options billingurlapproved
HKEY_CURRENT_USER\software\microsoft\windows\shellnoroam\muicache c:\program files\xpantivirus\xpantivirus.exe
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 publisher
HKEY_CURRENT_USER\software\xp antivirus\options updateurl
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\xpantivirusfilter imagepath
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\xpantivirusfilter start
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\xpantivirusfilter type
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\xpantivirusfilter\enum
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\xpantivirusfilter\enum count
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 nomodify
HKEY_CURRENT_USER\software\xp antivirus\options aff
HKEY_CURRENT_USER\software\xp antivirus\options registerurl
HKEY_CURRENT_USER\software\xp antivirus\options startminimized
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\xpantivirusfilter\enum initstartfailed
HKEY_CURRENT_USER\software\xp antivirus\options enablesysbackup
HKEY_CURRENT_USER\software\xp antivirus
HKEY_CURRENT_USER\software\xp antivirus\options checkhidden
HKEY_CURRENT_USER\software\xp antivirus\options enableadvanced
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 norepair
HKEY_CURRENT_USER\software\xp antivirus\options versionurl
HKEY_CURRENT_USER\software\xp antivirus\register
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer\browser helper objects\{9a19966f-ae0e-4699-8cce-9b6f5f1c352c}
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 quietuninstallstring
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 uninstallstring
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\xp antivirus_is1 urlinfoabout
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\xpantivirusfilter\enum nextinstance
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\xpantivirusfilter\security
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\xpantivirusfilter\security security
HKEY_CURRENT_USER\software\microsoft\windows\currentversion\run xp antivirus
Detect and Remove W32.Backdoor.j files:
%program_files%\xpantivirus\xpantivirus_log.txt
%program_files%\xpantivirus\unins000.dat
xpantivirus.lnk
xpantivirus.url
%program_files%\xpantivirus\backup.lst
%program_files%\xpantivirus\helper.sys
%program_files%\xpantivirus\pn.cfg
%program_files%\xpantivirus\ver.dat
%program_files%\xpantivirus\whitelist.cfg
%program_files%\xpantivirus\spyware.dat
%common_programs%\xp antivirus\uninstall xpantivirus.lnk
%common_programs%\xp antivirus\xpantivirus on the web.lnk
%common_programs%\xp antivirus\xpantivirus.lnk
%desktopdirectory%\xpantivirus.lnk
%profile%\application data\microsoft\internet explorer\quick launch\xpantivirus.lnk
Delete W32.Backdoor.j directories:
%program_files%\xpantivirus\sysbackup
%common_programs%\xp antivirus
%program_files%\xpantivirus\quarantine
Note: In any files I mention above, “%System%” is a variable referring to your PC’s System folder. Maybe you renamed it, but by default your System folder is “C:\Windows\System32″ on Windows XP, “C:\Winnt\System32″ on Windows NT/2000,” or “C:\Windows\System” on Windows 95/98/Me.
“%Program_Files%”, “%ProgramFiles%”, or “%Profile%” is a variable referring to a folder in your PC where applications that aren’t a part of your PC’s operating system are installed by default. You may have changed this folder’s name or moved it, but if you didn’t touch it, find the folder as “C:\Program Files”. If you’re having trouble finding this folder, you can locate it by looking up registry value “HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ProgramFilesDir”.
Also, “%UserProfile%” is a variable referring to your current user’s profile folder. If you’re using Windows NT/2000/XP, by default this is “C:\Documents and Settings\[CURRENT USER]” (e.g., “C:\Documents and Settings\JoeSmith”).
W32.Backdoor.j changed your homepage?
Click Windows Start menu > Control Panel > Internet Options. Next, under Home Page, select the General > Use Default. Type in the URL you want as your home page (e.g., “http://www.homepage.com”). Then select Apply > OK. You’ll want to open a fresh web page and make sure that your new default home page pops up.
Recommendation:
To save time and avoid risking destroying your computer, I highly recommend you use a spyware scanner, such as SpyHunter, to detect W32.Backdoor.j and other spyware, adware, trojans, viruses, keyloggers, and more that can be hidden in your PC. It’s also recommended before you manually remove W32.Backdoor.j you backup your system.
Free W32.Backdoor.j Scan, with SpyHunter
Automatically detect W32.Backdoor.j and other spyware on your PC with SpyHunter’s FREE spyware scan.
How Do I Remove W32.Backdoor.j Files?
Need help figuring out how to delete files, DLLs, and registry keys? While there’s some risk involved, and you should only manually remove W32.Backdoor.j files if you’re comfortable and confident editing your system, you’ll find it’s fairly easy to delete W32.Backdoor.j files in Windows.
How to delete W32.Backdoor.j files in Windows XP and Vista:
- Click your Windows Start menu, and from “Search,” click “For Files and Folders…“
- A speech bubble will pop up asking you, “What do you want to search for?” Click “All files and folders.”
- Type any file name in the search box, and select “Local Hard Drives.”
- Click “Search.” Once the file is found, delete it.
How to stop W32.Backdoor.j processes:
- Click the Start menu, select Run.
- Type taskmgr.exe into the the Run command box, and click “OK.” You can also launch the Task Manager by pressing keys ALT + CTRL + DELETE or CTRL + Shift + ESC.
- Click Processes tab, and find W32.Backdoor.j processes.
- Once you’ve found the W32.Backdoor.j processes, right-click them and select “End Process” to kill W32.Backdoor.j.
How to remove W32.Backdoor.j registry keys:
Your Windows registry is the core of your Windows operating system, storing information about user settings, system preferences, and software, including which applications automatically launch at start up. Because of this, spyware, malware, and adware will often bury their own files into your Windows registry so that they automatically launch every time your start up your PC.
Because your registry is such a key piece of your Windows system, you should always backup your registry before you make any changes to it. Editing your registry can be intimidating if you’re not a computer expert, and when you change or a delete a critical registry key or registry value, there’s a chance you may need to reinstall your entire Windows operating system. Make sure your backup your registry before editing it.
- Select your Windows menu “Start,” and click “Run.” An “Open” field will appear. Type “regedit” and click “OK” to open up your Registry Editor.
- Registry Editor will open as a window with two panes. The left side Registry Editor’s window lets you select various registry keys, and the right side displays the registry values of the registry key you select.
- To find a registry key, such as any W32.Backdoor.j registry keys, select “Edit,” then select “Find,” and in the search bar type any of W32.Backdoor.j’s registry keys.
- As soon as W32.Backdoor.j registry key appears, you can delete the W32.Backdoor.j registry key by right-clicking it and selecting “Modify,” then clicking “Delete.”
Computer acting funny after you’ve edited your registry and deleted W32.Backdoor.j registry keys? Just restore your registry with your backup.
How to remove W32.Backdoor.j DLL files:
Like most any software, spyware, adware, and malware may also use DLL files. DLL is short for “dynamically linked library,” and W32.Backdoor.j DLL files, like other DLLs, carryout predetermined tasks. To manually delete W32.Backdoor.j DLL files, you’ll use Regsver32, a Windows tool designed to help you remove DLL and other files.
- First you’ll locate W32.Backdoor.j DLL files you want to delete. Open your Windows Start menu, then click “Run.” Type “cmd” in Run, and click “OK.”
- To change your current directory, type “cd” in the command box, press your “Space” key, and enter the full directory where the W32.Backdoor.j DLL file is located. If you’re not sure if the W32.Backdoor.j DLL file is located in a particular directory, enter “dir” in the command box to display a directory’s contents. To go one directory back, enter “cd ..” in the command box and press “Enter.”
- When you’ve located the W32.Backdoor.j DLL file you want to remove, type “regsvr32 /u SampleDLLName.dll” (e.g., “regsvr32 /u jl27script.dll”) and press your “Enter” key.
That’s it. If you want to restore W32.Backdoor.j DLL file you removed, enter “regsvr32 DLLJustDeleted.dll” (e.g., “regsvr32 jl27script.dll”) into your command box, and press your “Enter” key.
How Did I Get W32.Backdoor.j?
You may be wondering how W32.Backdoor.j ended up on your PC. If you’re infected with W32.Backdoor.j or other spyware, your system’s and web browser’s security settings may be set too low, you may not follow safe web browsing and email habits, and you may need to regularly use a good anti-spyware application. Unsafe computer behavior that may lead to your PC having W32.Backdoor.j includes:
Freeware or Shareware:
Did you download and install shareware or freeware? These low-cost or free software applications may come bundled with spyware, adware, or programs like W32.Backdoor.j. Sometimes adware is attached to the free software to “pay” developers for the cost of creating the software, and more often spyware is secretly and maliciously attached to free software to harm your computer and steal your personal and financial information.
Peer-to-Peer Software:
Do you use a peer-to-peer (P2P) program or other application with a shared network? When you use these applications, you put your system at risk for unknowingly downloading an infected file, including applications like W32.Backdoor.j.
Questionable Websites: Did you visit a website that’s of questionable nature? When you visit malicious sites that are fishy and phishy, Trojans, spyware, and adware may be automatically downloaded and installed onto your computer, sometimes including applications like W32.Backdoor.j.
It’s important to practice safer online habits to prevent being infected with W32.Backdoor.j . You may want to scan your computer for the latest version of W32.Backdoor.j and other security threats.
Detect W32.Backdoor.j & Other Malware
Is your computer infected with malware?
When you’re infected with malware, whether it’s W32.Backdoor.j, spyware, adware, trojans, rogue anti-spyware, keyloggers, worms, or viruses, there are a few key symptoms you may experience. If you notice one or more of the symptoms listed below, your PC may be infected with W32.Backdoor.j or other malware. Continue reading below, or click here for a free malware scan.
Slow computer performance: It only takes one or two spyware parasites like W32.Backdoor.j to cause your computer to slow dramatically. If your PC takes longer than usual to reboot or if your Internet connection is unusually slow, your computer may be infected with malware.
New desktop shortcuts or switched homepage: Malware like W32.Backdoor.j may change your Internet settings or redirect your default homepage to another web site. Malware may even add new desktop shortcuts on your PC.
Annoying popups on your PC: Malware may bombard your computer with popup ads, even when you’re not online. Malware may stop your regular Internet activity and track your surfing habits and gather personal information about you, putting your financial and personal information at risk.
Understanding W32.Backdoor.j & Spyware
If you’re infected with W32.Backdoor.j and spyware, you should know what you’re fighting. I’ll explain some spyware definitions related to W32.Backdoor.j.
W32.Backdoor.j May Be Rogue Anti-Spyware
What’s Rogue Anti-Spyware?
Rogue anti-spyware - or suspect anti-spyware - refers to anti-spyware software of questionable value. Rogue anti-spyware may not be proven to protect your computer from spyware, may popup fake alerts or create many false positives about your PC being infected, or may use scare tactics to try to get you to purchase the application. Rogue anti-spyware software may be installed by a Trojan, come bundled with other software, or install itself through web browser security holes. While it is fairly rare, some rogue anti-spyware is created and distributed by known spyware or adware companies, and the rogue anti-spyware may install spyware or adware itself.
Often when you’re infected with rogue anti-spyware like W32.Backdoor.j, you’ll see a false popup security alert like this:

Rogue Anti-Spyware Tactics
Typically, rogue anti-spyware has one or more of the qualities listed below, which is why rogue anti-spyware is considered anti-spyware software of questionable value.
» False positives/fake alerts: Rogue anti-spyware may produce a large number of false positives or use fake alerts, noting that your computer is infected with spyware parasites or other threats that do not really exist.
» Copycat looks: Rogue anti-spyware may copy the look and feel of other legitimate or rogue anti-spyware applications. Often, rogue anti-spyware applications may appear as close clones of other rogue anti-spyware software.
» High pressure marketing: Rogue anti-spyware may use scare tactics or other aggressive advertising and marketing tactics to try to trick you into buying the rogue anti-spyware application. Often, rogue anti-spyware may produce false positives and fake alerts about your computer being infected.
» Poor detection/scan reporting: Rogue anti-spyware may produce poor reports when it scans your PC. For example, rogue anti-spyware may say your computer is infected 11 parasites, but not specify which spyware parasites or what type of parasites. Rogue anti-spyware may also report that your PC is infected with SafeAndClean, but not tell you which related files, DLLS, etc. were found on your computer.
» Weak scanning/detection: Rogue anti-spyware may not only poorly report on computer infection, but rogue antispyware may also poorly scan your PC. Rogue anti-spyware may skip over important folders and files of your computer that should be scanned to detect spyware.
W32.Backdoor.j may use these tactics to trick or scare you into purchasing W32.Backdoor.j.
W32.Backdoor.j May Be a Trojan
What Are Trojans?
Trojans install themselves secretly onto your computer, most often through your downloading a simple email attachment (often .avi, .pif, .exe, and even .jpg files.) Most Trojans are able to gain complete control over your PC after installation. With this control, the Trojan and the hacker behind it may change your system settings, delete important files, steal your passwords, and watch your computer acitivity.
Some Trojans may also fall under the category of spyware. Spyware is any software or malware (”malicious software”) used to spy or track your computer activity. While some spyware is legitimately and intentionally installed by parents or employers to monitor Internet activity on a computer, spyware may be installed maliciously. Often spyware may come bundled with downloads of free software or come in the form of a cookie via a website, and this spyware may track your Internet activity or may steal secret account usernames and passwords, credit card numbers, and other personal and financial information.
Methods of W32.Backdoor.j and Other Trojans Infection
Most trojans infect your computer by tricking you into running an infected application. This infected application could disguised as a small file, such as a jpeg or other email attachment, or it might be downloaded via a website or FTP.
» Email: Your PC may be infected with a trojan when you download infected email attachments, or sometimes even when you simply open an email. Many trojans exploit security holes in Microsoft Outlook. You may be able to reduce your chances of getting infected by a Trojan by using a spam-blocking software.
» Websites: Your PC may be infected with a trojan when you visit a rogue site. Many trojans exploit security holes in Internet Explorer web browser so that by simply visiting a website you may unknowingly download a Trojan.
» Open ports: If your computer runs programs that provide file-sharing functions - such as AOL Instant Messenger (AIM), MSN Messenger, and more - you may open your computer up to vulnerabilities. Using file sharing through these applications may create a network that gives attackers the opportunity to remotely access your computer.
W32.Backdoor.j may have infected your PC by through one of those methods. Trojans are some of the most sophisticated and dangerous type of malware, capable of controlling your system. Because of this, it may be best if W32.Backdoor.j and Trojans are removed from your computer immediately.
W32.Backdoor.j's Threat Level Explained
W32.Backdoor.j Is a Minor Pest 
The parasite isn't a real threat, but W32.Backdoor.j may track your Internet activities. W32.Backdoor.j may be easily removed with your Windows system "Add/Remove" function.
W32.Backdoor.j Is a Pest 
The parasite might profile you web activities and may have installed itself onto your PC via a drive-by download. You can probably manually remove W32.Backdoor.j yourself.
W32.Backdoor.j Is a Minor Threat 
The parasite might profile you and other users of your PC, and W32.Backdoor.j may send this data back to its parent server.
W32.Backdoor.j Is a Medium Threat 
The parasite might profile you and other users of your PC, and W32.Backdoor.j may send this data back to its parent server. W32.Backdoor.j may be impossible to manually remove.
W32.Backdoor.j Is a Threat 
The parasite might profile you and other users of your PC, and W32.Backdoor.j may send this data back to its parent server. W32.Backdoor.j may download and install more malware onto your PC, and W32.Backdoor.j may be impossible to manually remove.
W32.Backdoor.j Is a Minor Danger 
The parasite may profile you, log every keystroke you make, and take snopshots of your computer activity. W32.Backdoor.j may also be difficult to manually remove.
W32.Backdoor.j Is a Medium Danger 
The parasite may profile you, log every keystroke you make, and take snopshots of your computer activity. W32.Backdoor.j may download more malware and also be very difficult to manually remove.
W32.Backdoor.j Is a Danger 
The parasite may profile you, log every keystroke you make, and take snopshots of your computer activity. These logs may be sent to anonymous attacker, and W32.Backdoor.j may download more malware. W32.Backdoor.j may be very difficult to manually remove.
W32.Backdoor.j Is a Major Danger 
The parasite may track all of your computer activity, and W32.Backdoor.j may allow a hacker to access your PC. W32.Backdoor.j may pipe more malware into your computer, and may disable your anti-spyware or anti-virus software. W32.Backdoor.j may be very difficult to manually remove.
W32.Backdoor.j Is an Extreme Danger 
The parasite may track all of your computer activity, and W32.Backdoor.j may allow a hacker to control your computer. W32.Backdoor.j may pipe more malware into your computer, and may disable your anti-spyware or anti-virus software and firewall, and block your access to anti-spyware sites. W32.Backdoor.j may be very difficult to manually remove.




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