Hi,
Thank you for posting your query on Microsoft Community.
I would like to inform you that it could a virus.
Try the Methods to diagnose this issue.
Method 1:
I suggest you to perform clean boot and check, using this Microsoft Article because may be a third party application is causing this issue.
https://support.microsoft.com/en-us/kb/929135
**NOTE:**A clean boot is performed to start Windows by using a minimal set of drivers and startup programs. This helps eliminate software conflicts that occur when you install a program or an update or when you run a program in Windows. You may also troubleshoot or determine what conflict is causing the problem by performing a clean boot. You must log on to the computer as an administrator to be able to perform a clean boot. Your computer may temporarily lose some functionality when you perform a clean boot. When you start the computer normally, the functionality returns. However, you may receive the original error message, or experience the original behavior if the problem still exists. If the computer is connected to a network, network policy settings may prevent you from following these steps.
https://support.microsoft.com/kb/929135
Once you perform clean boot do refer to the section “How to reset the computer to start normally after clean boot troubleshooting” to boot the computer in normal mode.
Method 2:
I would also suggest you to scan your computer with Microsoft Safety Scanner, which would help us to get rid of viruses, spyware, and other malicious software. The Microsoft Safety Scanner is a free security tool that provides on-demand scanning and helps remove viruses, spyware, and other malicious software. It works with your existing Antivirus software. Refer to the link to download and run the scanner:
http://www.microsoft.com/security/scanner/en-us/default.aspx
**Note:**The Microsoft Safety Scanner expires 10 days after being downloaded. To rerun a scan with the latest anti-malware definitions, download and run the Microsoft Safety Scanner again.
**Important:**Any data files that are infected may only be cleaned by deleting the file entirely, which means there is a potential for data loss.
Hope this information helps. Please let us know if you need any other assistance with Windows in future. We will be happy to assist you.