How to Detect & Remove OPA11.BACK

What's OPA11.BACK?

OPA11.BACK Threat Level: OPA11.BACK is a pest

OPA11.BACK screenshot OPA11.BACK is a “privacy violation” that appears in fake security scans from rogue antispyware software CrisysTec Sentry 3.0.

OPA11.BACK isn’t a privacy risk — just an annoyance. The only thing at risk is your sanity. All you need to do is remove CrisysTec Sentry 3.0 with the instructions below.

Do I Have OPA11.BACK?

You can search your computer manually, but it might take hours to find OPA11.BACK’s hidden files. To save time, I recommend you automatically scan your PC for OPA11.BACK and other spyware. Why not? It’s free.

Remove OPA11.BACKFree OPA11.BACK Scan, with SpyHunter

You can easily detect OPA11.BACK with SpyHunter’s FREE spyware scanner. And if you’re really infected with OPA11.BACK, you can buy the full version of SpyHunter to remove OPA11.BACK and other spyware. Or you can use my instructions below and remove OPA11.BACK 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 OPA11.BACK, you can get a custom fix for your computer.

How to Remove OPA11.BACK

Your best protection against OPA11.BACK is to remove OPA11.BACK processes, registry keys, DLLs, and other files ASAP.

Get Rid of OPA11.BACK Manually

OPA11.BACK warning Manual removal of any spyware can be difficult. When you manually remove OPA11.BACK, 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 OPA11.BACK. Also, I recommend you backup your system any time before editing your registry.

To remove OPA11.BACK manually, you need to delete OPA11.BACK files. Not sure how to delete OPA11.BACK files? Click here, and I’ll tell you. Otherwise, go ahead and…

Stop OPA11.BACK processes:

%ProgramFiles%\Critical Systems Technologies\CrisysTec Sentry\BSwap.exe
%ProgramFiles%\Critical Systems Technologies\CrisysTec Sentry\Sentry.exe
%ProgramFiles%\Critical Systems Technologies\CrisysTec Sentry\Uninstall.exe

Remove OPA11.BACK files:

%UserProfile%\Desktop\CrisysTec Sentry 3.0.lnk
%UserProfile%\Start Menu\Programs\CrisysTec Sentry\CrisysTec Sentry Help file.lnk
%UserProfile%\Start Menu\Programs\CrisysTec Sentry\CrisysTec Sentry.lnk
%UserProfile%\Start Menu\Programs\CrisysTec Sentry\Uninstall CrisysTec Sentry.lnk
%ProgramFiles%\Critical Systems Technologies\CrisysTec Sentry\INSTALL.LOG
%ProgramFiles%\Critical Systems Technologies\CrisysTec Sentry\install.sss
%ProgramFiles%\Critical Systems Technologies\CrisysTec Sentry\Plugins\Extensions.plugin_example
%ProgramFiles%\Critical Systems Technologies\CrisysTec Sentry\Plugins\Extensions83.plugin
%ProgramFiles%\Critical Systems Technologies\CrisysTec Sentry\RestoreRegistry.reg
%ProgramFiles%\Critical Systems Technologies\CrisysTec Sentry\Sentry.chm

Remove OPA11.BACK registry keys:

HKEY_ALL_USERS\Software\Microsoft\Windows\CurrentVersion\Run\”CrisysTec Sentry” = “C:\Program Files\Critical Systems Technologies\CrisysTec Sentry\Sentry.exe -Minimized”
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{645FF040-5081-101B-9F08-00AA002F954E}\Shell
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{34BCE26E-D9F8-46CB-8A59-B473A14471F0}
HKEY_ALL_USERS\Software\Critical Systems Technologies
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\SharedDlls\C:\Program
Files\Critical Systems Technologies\CrisysTec Sentry\Uninstall.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{645FF040-5081-101B-9F08-00AA002F954E}\”(Default)” = “CrisysTec Protected Recycle Bin”
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{645FF040-5081-101B-9F08-00AA002F954E}\LocalizedString\”(Default)” = “CrisysTec Protected Recycle Bin”

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”).

OPA11.BACK 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:

OPA11.BACK removal warning To save time and avoid risking destroying your computer, I highly recommend you use a spyware scanner, such as SpyHunter, to detect OPA11.BACK and other spyware, adware, trojans, viruses, keyloggers, and more that can be hidden in your PC. It’s also recommended before you manually remove OPA11.BACK you backup your system.

Remove OPA11.BACK

Free OPA11.BACK Scan, with SpyHunter

Automatically detect OPA11.BACK and other spyware on your PC with SpyHunter’s FREE spyware scan.

How Do I Remove OPA11.BACK 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 OPA11.BACK files if you’re comfortable and confident editing your system, you’ll find it’s fairly easy to delete OPA11.BACK files in Windows.

How to delete OPA11.BACK files in Windows XP and Vista:

  1. Click your Windows Start menu, and from “Search,” click “For Files and Folders…
  2. A speech bubble will pop up asking you, “What do you want to search for?” Click “All files and folders.”
  3. Type any file name in the search box, and select “Local Hard Drives.”
  4. Click “Search.” Once the file is found, delete it.

How to stop OPA11.BACK processes:

  1. Click the Start menu, select Run.
  2. 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.
  3. Click Processes tab, and find OPA11.BACK processes.
  4. Once you’ve found the OPA11.BACK processes, right-click them and select “End Process” to kill OPA11.BACK.

How to remove OPA11.BACK 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.

Registry Repair Warning for OPA11.BACK 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.

  1. Select your Windows menu “Start,” and click “Run.” An “Open” field will appear. Type “regedit” and click “OK” to open up your Registry Editor.
  2. 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.
  3. To find a registry key, such as any OPA11.BACK registry keys, select “Edit,” then select “Find,” and in the search bar type any of OPA11.BACK’s registry keys.
  4. As soon as OPA11.BACK registry key appears, you can delete the OPA11.BACK registry key by right-clicking it and selecting “Modify,” then clicking “Delete.”

Computer acting funny after you’ve edited your registry and deleted OPA11.BACK registry keys? Just restore your registry with your backup.

How to remove OPA11.BACK DLL files:

Like most any software, spyware, adware, and malware may also use DLL files. DLL is short for “dynamically linked library,” and OPA11.BACK DLL files, like other DLLs, carryout predetermined tasks. To manually delete OPA11.BACK DLL files, you’ll use Regsver32, a Windows tool designed to help you remove DLL and other files.

  1. First you’ll locate OPA11.BACK DLL files you want to delete. Open your Windows Start menu, then click “Run.” Type “cmd” in Run, and click “OK.”
  2. To change your current directory, type “cd” in the command box, press your “Space” key, and enter the full directory where the OPA11.BACK DLL file is located. If you’re not sure if the OPA11.BACK 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.”
  3. When you’ve located the OPA11.BACK 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 OPA11.BACK 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 OPA11.BACK?

You may be wondering how OPA11.BACK ended up on your PC. If you’re infected with OPA11.BACK 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 OPA11.BACK 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 OPA11.BACK. 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 OPA11.BACK.

 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 OPA11.BACK.

It’s important to practice safer online habits to prevent being infected with OPA11.BACK . You may want to scan your computer for the latest version of OPA11.BACK and other security threats.

Detect OPA11.BACK & Other Malware

Is your computer infected with malware?

When you’re infected with malware, whether it’s OPA11.BACK, 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 OPA11.BACK 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 OPA11.BACK 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 OPA11.BACK 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 OPA11.BACK & Spyware

If you’re infected with OPA11.BACK and spyware, you should know what you’re fighting. I’ll explain some spyware definitions related to OPA11.BACK.

OPA11.BACK 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 OPA11.BACK, you’ll see a false popup security alert like this:

OPA11.BACK  popup

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.

OPA11.BACK may use these tactics to trick or scare you into purchasing OPA11.BACK.

OPA11.BACK May Be Rogue Registry Cleaner

What’s a Rogue Registry Cleaner?

Rogue registry cleaners - or suspect registry cleaners - are registry cleaner software of questionable value. Rogue registry cleaners may not be proven to repair your PC’s registry issues, may popup fake alerts or create many false positives about your PC being damaged, or may use scare tactics to try to get you to purchase the application. Rogue registry repair software may be installed by a Trojan, come bundled with other software, or install itself through web browser security holes. You may have also downloaded the rogue registry cleaner from its own site.

Rogue Registry Cleaner Tactics

Typically, a rogue registry cleaner such as OPA11.BACK has one or more of the qualities listed below, which is why rogue registry cleaners are considered registry cleaning software of questionable value.

 False positives/fake alerts: Rogue registry cleaner may produce a large number of false positives or use fake alerts, noting that your computer has registry errors that don’t really exist.

 Copycat looks: Rogue registry cleaners may copy the look and feel of other legitimate registry cleaners. Often, rogue registry cleaners may appear as close clones of other rogue registry cleaner software.

 High pressure marketing: Rogue registry cleaners may use scare tactics or other aggressive advertising and marketing tactics to try to trick you into buying the rogue registry cleaner application. Often, rogue registry cleaners may produce false positives and fake alerts about your system being damaged.

 Poor detection/scan reporting: Rogue registry cleaner software may produce poor reports when it scans your PC. For example, a rogue registry cleaner may say your computer has 12 registry errors, but not specify which what types of errors. Rogue registry cleaners may also report that your PC has Fake Error #20, but not tell you which files or registry keys are specifically damaged.

 Weak scanning/detection: Rogue registry cleaner applications may not only poorly report on registry errors, but rogue registry cleaners may also poorly scan your PC. Rogue registry cleaner applications may skip over important folders and files of your computer that should be scanned to detect errors.

OPA11.BACK may use these tactics to trick or scare you into purchasing OPA11.BACK.

OPA11.BACK's Threat Level Explained

OPA11.BACK Is a Minor Pest OPA11.BACK is a minor pest

The parasite isn't a real threat, but OPA11.BACK may track your Internet activities. OPA11.BACK may be easily removed with your Windows system "Add/Remove" function.

OPA11.BACK Is a Pest OPA11.BACK 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 OPA11.BACK yourself.

OPA11.BACK Is a Minor Threat OPA11.BACK is a minor threat

The parasite might profile you and other users of your PC, and OPA11.BACK may send this data back to its parent server.

OPA11.BACK Is a Medium Threat OPA11.BACK is a medium threat

The parasite might profile you and other users of your PC, and OPA11.BACK may send this data back to its parent server. OPA11.BACK may be impossible to manually remove.

OPA11.BACK Is a Threat OPA11.BACK is a threat

The parasite might profile you and other users of your PC, and OPA11.BACK may send this data back to its parent server. OPA11.BACK may download and install more malware onto your PC, and OPA11.BACK may be impossible to manually remove.

OPA11.BACK Is a Minor Danger OPA11.BACK is a minor danger

The parasite may profile you, log every keystroke you make, and take snopshots of your computer activity. OPA11.BACK may also be difficult to manually remove.

OPA11.BACK Is a Medium Danger OPA11.BACK is a medium danger

The parasite may profile you, log every keystroke you make, and take snopshots of your computer activity. OPA11.BACK may download more malware and also be very difficult to manually remove.

OPA11.BACK Is a Danger OPA11.BACK 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 OPA11.BACK may download more malware. OPA11.BACK may be very difficult to manually remove.

OPA11.BACK Is a Major Danger OPA11.BACK is a major danger

The parasite may track all of your computer activity, and OPA11.BACK may allow a hacker to access your PC. OPA11.BACK may pipe more malware into your computer, and may disable your anti-spyware or anti-virus software. OPA11.BACK may be very difficult to manually remove.

OPA11.BACK Is an Extreme Danger OPA11.BACK is an extreme danger

The parasite may track all of your computer activity, and OPA11.BACK may allow a hacker to control your computer. OPA11.BACK 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. OPA11.BACK may be very difficult to manually remove.

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