The whole point of a
BSoD is to protect your hardware. When Windows senses that something
could cause real harm, it stops everything, resulting in the infamous
Blue Screen of Death.
Officially, Microsoft calls these most hated of Windows screens Stop Errors. But most people prefer the nickname Blue Screen of Death.(abbreviated as BSoD).
A BSoD can be a symptom of a hardware problem. In that case, it might look as if the error itself caused the problem.
You're busy working
or playing, and suddenly everything stops. You'll have to reboot the
computer, then reload the programs and files you had open, and only
after all that get back to work.
And you may have to
do some of that work over.
When Windows crashes, it takes everything in
RAM with it. If you were working on, say, a document, you will lose
everything written since your word processor last saved to disk.a singleBSoD is nothing to worry about.
But if they start happening frequently, you've got a problem that needs to be addressed.