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What does the csrss.exe file do?

The csrss.exe process is also known as Client Server Runtime Process or, as the case may be, SFX Cabinet Self-Extractor and is a part of Microsoft Windows Operating System or, as the case may be, update. This software is produced by Microsoft (www.microsoft.com) or, as the case may be, SFX Cabinet Self-Extractor. An obsolete or defective version of csrss.exe can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about csrss.exe Client Server Runtime Process

csrss.exe is a Windows system file. Csrss.exe is found in the C:\Windows\System32 directory. Frequently occurring are file sizes such as 6,144 bytes (93% of all these files), 7,680 bytes as well as 4 other variants.
This file is part of the Windows operating system found in C:\Windows\. It has been digitally signed by Microsoft itself to guarantee its authenticity. The program executes in the background, and can only be terminated using Windows Task Manager. For this reason, 4% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

csrss.exe is a system file used by Microsoft Windows, and appears in Windows Task Manager as a process named "Client Server Runtime Process." However, some viruses or Trojans use the same file name in order to remain undetected (such as Packed.Win32.Black.a or, as the case may be, Trojan-Downloader.Win32.Agent.bl (recognized by Kaspersky), as well as Trojan.Generic.KDV.184900 or, as the case may be, Trojan.Downloader.Agent.BL (recognized by BitDefender)).
To be really safe, you should scan your computer with two different anti-virus engines. You can use a free Anti-Malware scanner for this purpose.

Objectionable files with the same file name have the following characteristics:

If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves csrss.exe. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.

What do other computer users say about csrss?

Windows Client/Server Runtime Server Subsystem
can also be put in C:\\Windows directory by the W32.Netsky.AB worm, an SMTP mass-mailer (further information...)
multiple cmd.exe windows popups up at a particular time once a week and the CSRSS.exe in monitor graph shows 98% process time. It goes down if you start killing the popups. It does harm the applications running, however, there are so many cmd windows popuped and you need to close them. There is sql client request that keeps on running everytime, but once a week some thing happens and multiple cmd windows pop up. There is no other csrss.exe in c:\windows\system32 and as there is no i386 folder because it is on windows server 2008. I hope there is no virus on the system if that is cause from above various discussions. (further information...)

Summary: 141 users judge csrss.exe to be an essential file that should not be touched. 26 users consider it harmless. However, 66 users consider this to be a suspicious process and would like to get rid of it. For this reason, 109 users have already deleted csrss.exe. source: file.net

How to uninstall the program or update

csrss.exe Client Server Runtime Process fix

To remove Client Server Runtime Process from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. In Windows 8, look for Control Panel.
  2. Click Control Panel.
  3. Click Uninstall a program.
  4. Look for the program or update in the list of available programs.
  5. Click Uninstall.

How to tell if csrss.exe (Client Server Runtime Process) was uninstalled cleanly

After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of Client Server Runtime Process. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for Client Server Runtime Process or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.

What to do if a program does not uninstall

The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.

Last but not least

If Windows not working quite right for you, or if startup is taking a long time, or csrss.exe is causing problems for you, a good Windows diagnostic tool may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.

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