Stop errors (also sometimes called blue screen or black screen errors) can occur if a serious problem causes Windows 7 to shut down or restart unexpectedly. You might see a message that says, "Windows has been shut down to prevent damage to your computer."
I may not elaborate whole thing But suggest few which solve yours take a look into below sites
http://windows.microsoft.com/en-in/windows7/resolving-stop-blue-screen-errors-in-windows-7
http://www.howtogeek.com/173828/what-to-do-when-windows-wont-boot/
I think it helps you to sort out your problem.
Hi all, i wanna ask,
Hi,all.I want to ask,
Why when i turn on my laptop,after the loading screen of microsoft windows there is a message like this : STOP:c000007b (bad image)
C:\Program Files\AVG\AV\avgps (whatever it) is either not designed to run on windows.Try installing the program using original installation media or contact your system administator the software vendor"
Can anyone help?the problem is on my laptop or the apps?
Thank you before

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