pc problems

ok guys this is what it is saying

windows could not start because the following file is missing or corrupt:
\windows\system32\config\system

looked online gives me fix for it but my uncle doesnt have cd. need to know if there is any other way to do it. if not i need a cd if u have one laying around. then my uncle would be pleased with me and i would be much appreciated to u peeps.

dragon

dragon what version of windows? XP, Vista, 7? also what flavor, is it Professional? Ultimate?

windows home 32 xp i believe
flaovor i dont know