What is Csrss.exe?
The csrss.exe process is used by the Microsoft Client Server Runtime Subsystem to manage the majority of the graphical instruction sets on a Windows PC.
This process loads automatically at system startup. Csrss.exe is located in C:\Windows\System32 folder and is mainly found in 6,144 byte size. Its other known sizes are 4,096 and 7,680 bytes.
How to determine if Csrss.exe is a virus
The true csrss.exe file is an important windows file, which terminating may cause the Blue Screen of Death or bsod error. However, the csrss.exe file is also a registered Trojan that allows unscrupulous people access to your system in order to steal your personal and confidential information, such as e-mail passwords, credit card numbers, Internet Banking details and account numbers.
You can verify whether or not your PC is infected with the csrss.exe virus by going through the list of processes running on your PC. To do this, press Ctrl + Alt + Del to open the Task Manager Window. Click on the Processes tab and browse through the list. If you see only one csrss.exe process running then you are safe. The presence of more than one csrss.exe process indicates a malware infection.
To ensure csrss.exe removal as well as the removal of other malware programs, you need to perform a virus/malware scan of your entire system using a reliable antivirus tool, such as STOPzilla Antivirus and an antispyware tool, such as Spyware Cease.
You can also remove the bad csrss.exe file manually. Before, you proceed with the manual removal process; you need to enable the Show hidden files and folders option in Windows Explorer. Here are the steps:
- Double-click on the My computer icon.
- Click Tools > Folder options and then on display the View tab.
- Go through the options given in Advanced Settings and under the Hidden files and folders option, select Show hidden files and folders and then clear the Hide extensions for known file types option.
Now, proceed with the following steps to manually remove the csrss.exe file:
- Go to Start and click Search.
- Next, in the Search Results window, click the All files and folders option.
- Type csrss.exe in the All or part of the file name box.
- Select Local Hard Drives in the Look in box.
- Click Search.
- Go through the results. The true csrss.exe file will reside in the C:\Windows\System32 folder. The virus version of csrss.exe may be present anywhere.
- Right-click the unsolicited csrss.exe file and select Delete.
- If you are unable to delete the file, right-click on the file again, select Cut and then Paste the file on your desktop.
- Next, rename the file you have pasted on the Desktop and change its file extension from exe to some other type.
- Now, try to delete this file. If you are still unable to delete the file, restart your PC and then delete the file.
How to fix the csrss.exe cpu usage problem
If you are frequently plagued with the 100% CPU usage problem by the csrss.exe process, then chances are that the user profile with which you are logged on is corrupt. To rectify this issue, you need to delete your existing profile. We recommend that you back up your data before deleting the profile.
Perform the following steps to delete a corrupt profile:
- Log on to your system as an administrator.
- Right-click on the My Computer icon, select Properties and then click on the Advanced tab.
- Here, under the User Profiles option, click Settings.
- Select the corrupt profile and press Delete.
- Restart your PC, log on again as an administrator and create a new profile.
- Finally, log off and then logon using the new username and password.