Windows Help plz

Im after messing up my windows for like the 100th time.. anyway,

So I uninstalled sp2 and tryed to reinstall it which caused windows to stop booting, so I done a windows repair with a sp1 disc, but now when windows starts back up, and I run windows update it installs all the sp1 updates (then won't boot after the restart) But the windows update tells me that I already have sp2 installed when i haven't..

So anyone any idea how the fuck to fix my prob?


Edit : Yes i know wtf did i uninstall sp2 for, my pc was hanging and i wanted to reinstall it
:P

Edit2 : SP2 wont even install downloaded a separate version it froze