When asking for help there are several items of interest that should be stated in the beginning.
What is the problem, what os you are using with sp number and have you added any new hardware or programs before the problem presented itself. Also it would help those who respond to know if there were any error messages, and just what steps you have taken to correct the problem.
HELP! my computer has crashed will get VERY little help right away because the person that will try to help you get it back up and running will have to use two or more respondences to get information as to what you or it was doing when it crashed.
Please if you see a thread with a similar problem to what you are having, DO NOT hijack that thread. It may help you if you will read the entire thread and apply the actions to your case. If these actions do not repair your problem then please start a new thread, giving the information needed. You will get a respondence quicker that way.And besides it is just plain rude to hijack someone's thread.