How can we identify blue screen error and resolve?

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.

The following tools can help you uninstall or roll back software changes, repair Windows startup files, and restore your system from an earlier backup. If none of those suggestions fix the problem, you can reinstall Windows 7.   Several of the following tools are located on the System Recovery Options menu. This menu is preinstalled on your computer's hard disk, and is also on the Windows 7 installation media.

1 -Diagnosing the problem

2 -Analyzing the crash report

3 -Fixing the problem