1. Did you make any software changes to the computer recently?
Let us first run the sfc scan and check if there are any system file corruptions.
a. To do this, click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator password or for a confirmation, type the password, or click Allow.
b. Type the following command, and then press ENTER:
The sfc /scannow command scans all protected system files and replaces incorrect versions with correct Microsoft versions.
I would also recommend you to install the free security software from Microsoft. Which is easy to install and updates automatically
Here is the link to download it. http://www.microsoft.com/securepc
Hope this helps.
Thanks and Regards: Shekhar S - Microsoft Support.
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Thanks and Regards, Shekhar Sharma
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