What is csrss.exe?

csrss.exeThe process file is an abbreviation of client/server run-time subsystem and is considered to be essentially and running on your system constantly. This file/process is required for the creation and deletion of threads, console windows, and certain aspects of the MS-DOS system as well.

While the process itself can be running more than once on a single computer, if you notice more than 1 or 2 “csrss.exe” process running, it may be bad news. What may have happened is the infection of a Trojan file. This means it may allow intruders access to your personal files and information without ever physically touching your computer. The nature of the intrusion is called “remote access” and should be ended as quickly as you possibly can.

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Should the file be stopped?

As mentioned above, the file should only be stopped if it is causing errors and/or known to be infected. If not, the file is likely to be safe and secure and it is actually a system file. According to Wikipedia, it is a Windows system file. This file is considered as critical to system operation. This means ending the file will likely result in the inability for you to properly use your computer system.

What are known viruses or threats associated with csrss.exe?

A couple of malicious files have been reported to be related directly to this process:

  • Nimda.E
  • W32/Netsky.ab@MM
  • W32/VBMania@MM

If you see these files showing up after running a computer scan, it is possible your csrss.exe is infected.

What is the best way to get rid of csrss.exe errors?

The best way to get rid of errors, whether this file or otherwise, would be to find the source of the problem. If it is actually related to csrss.exe itself, you may need to perform a complete system format/re-store. However, if a Trojan (or other malware file) has disguised itself as csrss.exe, it may be slightly easier to fix.

Before you proceed, run a quick system scan to check and see if your computer is secure.

After you run the scan, depending on the volume of errors it detects, it still may be the best option for you to run a complete system clean. The benefits of formatting and/or re-installing your entire system include:

  • Knowing any malicious files have been removed
  • Removing any other unnecessary applications or programs
  • Removing the ability for remote access through previously installed applications

Be careful if you decide to do a complete system wipe. Make sure you back up your documents, images, bookmarks, passwords, and anything else you want to save. Then, make sure you re-install your system with secure software. Following these steps should provide you with a decent baseline for keeping your computer safe and secure. As always, make sure you have a constant system scan running.

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