Hi Kuroshio ,
Thank you for using Microsoft Answers forums.
Since when are you facing this issue?
i would suggest you to perform clean boot on your computer and check if this helps.
Method 1: Starting your computer by using a minimal set of drivers and startup programs so that you can determine whether a background program is interfering with your game or program. This kind of startup is known as a "Clean boot."
To perform a clean boot on a computer, follow these steps.
1. Click Start, type msconfig in the Start Search box, and then press ENTER.
If you are prompted for an administrator password or for a confirmation, type the password, or click Continue.
2. On the General tab, click Selective Startup.
3. Under Selective Startup, click to clear the Load Startup Items check box.
4. Click the Services tab, click to select the Hide All Microsoft Services check box, and then click Disable All.
5. Click OK.
6. When you are prompted, click Restart.
7. After the computer starts, check whether the problem is resolved.
Please monitor the system in the Clean Boot environment. If the problem does not occur, it indicates that the problem is related to one application or service we have disabled. You may use the MSCONFIG tool again to re-enable the disabled item one by one to find out the culprit.
If your issue is resolved, follow the How to Determine What is Causing the Problem section in the KB article to narrow down the exact source.
http://support.microsoft.com/kb/331796 . Also, see the section on how to return your computer to a Normal startup mode
If still the same problem persists then perform system restore.
Method 2: System restore will take your computer to pervious state when it was not facing such problem, this can be done by selecting the proper restore point.
To restore the operating system to an earlier point in time, follow these steps:
- Click Start, type system restore in the Start Search box, and then click System Restore in the Programs list.
If you are prompted for an administrator password or confirmation, type your password or click Continue.
- In the System Restore dialog box, click Choose a different restore point, and then click Next.
- In the list of restore points, click a restore point that was created before you began to experience the issue, and then click Next.
- Click Finish.
For more information visit http://support.microsoft.com/kb/936212/
Also run an online malware/virus scan on the computer.
http://onecare.live.com/site/en-US/default.htm
Hope this information is helpful.
Let me know if this worked.
Thanks and Regards:
Umesh P - Microsoft Support