First you need to Google blue screen code. Typically, there are 2 categories of issues : system is corrupted or hardware is malfunctioning.
If system is corrupted, then you have to reinstall windows, or some drivers, software.
If hardware is corrupted, you need to replace broken parts. Typically it is ram, but might be disk, or processor overheating.
Blue Screen Of Death
Error messages appear on a blue screen called a blue screen of death. (BSOD)
The BSOD, or blue screen of death, is a blue error screen that represents an error within your system. The error may be fatal, or just a simple memory error.
fatal error can cause software to exit/crash. When OS get Fatal Error then you may get the BSOD (the blue screen with the error that caused the OS to crash).
Yup. That is the technical name of the Blue Screen of Death.
(BSOD) Blue screen of death.
This is sometimes referred to as "the Blue Screen of Death" or a "hard stop error".
http://www.ofzenandcomputing.com/fix-mac-blue-screen-boot/
Halt
This would depend on the error number on the blue screen There are 3 step to repair blue screen error If you got blue screen error then there is a 94% chance that your computer has registry problems. To repair blue screen error you need to follow the steps below: * Step 1 - Download a Perfect Optimizer,install this error repair tool. * Step 2 - Click the Repair All Button.It will scan you PC for Free. * Step 3 - Then click the Repair All Button again and your done! It is very easy to repair blue screen error. Here are the URL of Perfect Optimizer: http://www.fixerror365.com/tidpp-blue_screen_error-zz0005 Find the below blog link for information related to blue screen error and to find how to solve it http://system-helper.blogspot.com/2011/03/getting-blue-screen-error.HTML
corrupted hdd...
the blue screen of death