My comp. always restart by it self and it will have csrcs.exe error. What is it and how to handel it.

Its possible you have a virus on your computer. You need to check for that first.
http://techsalsa.com/steps-to-remove-csrcsexe-or-csrscexe-virus/

If you have an xp boot disk, you could just boot with that and replace it via the command prompt, if you can't boot because of it.