Client Server Runtime Process

csrss.exe. What is it?

Csrss.exe stands for Client/Server Runtime Subsystem. The file is developed by Microsoft Corporation and is a vital Windows NT (2000, XP, 2003, Vista, Server 2008, and 7) component that provides the user mode side of the Win32 subsystem. The csrss process is responsible for managing most graphical instruction sets, Win32 console windows, and threading when an application can split into multiple simultaneously run tasks. Csrss.exe is critical to system operation. Terminating this process will result in Windows stop error – the Blue Screen of Death (BSOD).

Csrss.exe and Malware

Malware often disguises itself as csrss. The file should be located in the C:\Windows\System32 folder. If it’s located somewhere else, it could be a virus, trojan, worm, or spyware. Scan your computer with Auslogics Antivirus to make sure it's not infected.

Sometimes this process can cause 100% CPU usage when users right-click something on Desktop or in Windows Explorer. This problem occurs if your current user profile is corrupt. You can easily fix it by deleting your existing user profile. IMPORTANT: Make sure you back up the contents of your My Documents folder and any other important data that is stored in your current profile, such as application settings, files on your Desktop, emails, favourites, etc. Once the profile is deleted, you will not be able to recover any data stored in the profile.

To delete a profile:

1. Log off and log back on using a profile that has administrative privileges (not your corrupt profile).

2. Open the user profiles list: right-click My Computer, click Properties, go to the Advanced tab and click Settings under User Profile.

3. Select your corrupt profile and click Delete.
4. Log off and log back on using your profile details – a new profile will be created for you when you log in.

If Csrss.exe Crashes Your Computer

If your computer keeps crashing and you keep getting a “C:\Windows\Config\csrss.exe” error, most likely you are suffering from remnants of a csrss virus. Here’s what you can do to get rid of them:

1. Backup the Windows Registry

2.Click Start Run – type regedit and click OK


3.This will open Registry Editor


4. Find this key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon/p> 5. Look for a value named Shell

6. If it’s Explorer.exe C:\WINDOWS\System32\csrss.exe, change it to Explorer.exe

7. Reboot your computer

If that didn’t solve the problem, try the following:

1. Backup the Registry

2. Click Start Run – type regedit and click OK to open Registry Editor

3. Click Edit Find – type c:\windows\config\csrss.exe

4. If you find it, delete it, because this entry shouldn’t be there

5. Reboot your computer


We also recommend to clean the Registry with Auslogics Registry Cleaner to ensure that there are no corrupt or obsolete entries.


The csrss.exe process is safe and disabling it can be dangerous, because programs on your computer need it to work correctly. Some other processes use the same file name. Use reliable anti-virus and anti-spyware software to ensure csrss.exe is legitimate.


Author: Microsoft CorporationPart Of: Microsoft® Windows® Operating SystemCommon path(s): subfolder %SYSTEM%
subfolder %WINDOWS%
subfolder %WINDOWS%
subfolder %SYSTEM%


Malware risk: Scan your PC for viruses and Trojans
Some viruses infect computers while disguised in the form of legitimate files, like csrss.exe. Run an antivirus scan to ensure your PC is clean and safe.
Registry Errors: Free scan (run Registry Cleaner)Uninstallation: N/A Uninstall (run Unistall Manager)Disk & Memory Usage: N/A Free scan (run Task Manager)

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by Cosa on May 1, 2012 at 11:31 PM

?????:salam be hameye dustnae aziz. bebakhshid man ye soal dar morede booter dashtam. ke chand vaghte har kari mikonam on nemishe. az ye tarafam file haye komaki ro tu site baraye win xp. peyda nemikonam akhe fekr konam file komaki pak shode az winam. .ehsas mikonam ye seri taghirat ijad shode. age mishe rahnamayim konid . memnun

2 | 0
by Vadim on Apr 29, 2012 at 09:41 PM

Great coommn sense here. Wish I'd thought of that.

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by Jon on Apr 29, 2012 at 12:39 PM

With the bases loaded you struck us out with that asnewr!

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by Smiley on Jan 2, 2012 at 09:21 AM

I was lokonig everywhere and this popped up like nothing!

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by shalom on Apr 21, 2011 at 03:57 AM

Great info, You can learn more about csrss at www.csrss-exe.com Apparently there making blogs on everything today

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by csrss on Aug 8, 2010 at 11:45 AM

windows wont work without that file but you should check him for viruses and trojans you can find more info about that file in csrss-exe.com

0 | 1
by Blackrain on Jun 15, 2010 at 11:13 AM

csrss.exe 6076 kb csrss.exe 7424 kb Which file is good or bad or are they both needed for window vista 32?

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by Blackrain on Jun 15, 2010 at 11:08 AM

Please lets us know what file size csrss is supposed to be for various windows OS. I have Vista 32 and i see two csrss files both in the C:\Windows\System32 folder. one is 6 kb the other is 7kb.. Are they both supposed to be there? If not which one do i get rid of?

0 | 0
by Jane on Nov 13, 2009 at 04:54 AM

Essential Windows file. Though watch out for viruses with the same name.

6 | 0
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