Hi,
Thank you for posting in the Microsoft Community forum.
Based on the above description, it appears that you’re facing issues with blue screen.
Please provide us the answers to the following questions to help you troubleshoot the issue better.
1. Were there any recent changes made to the computer prior to the issue?
I would suggest you to try the steps mentioned from the link, this would help us to resolving stop (blue screen) errors in Windows 7.
http://windows.microsoft.com/en-us/windows7/Resolving-stop-blue-screen-errors-in-Windows-7
Important: While performing check disk on the hard drive if any bad sectors are found on the hard drive when check disk tries to repair that sector if any data available on that might be lost.
For any Windows related issues please feel free to contact us or let us know and we will be glad to help.