SP2 messed up my computer

I just installe SP2 and I cannot do ANYTHING, I get errors similar to the one below if i try open somthing..., I will of course uninstall sp2 and will wait until further instructions on this board to reinstall it. Any help would be thankful! ty ^^

The instruction at "0x023be9dc" referenced memory at "0x00000000." The memory could not be written.

o btw i am on another comp. typing this DUH lol ^^