help! can't use any internet

connection.

yesterday, i accidently deleted the file svchost.exe in windows/system32/drivers/, since then i can't use any connection. another 2 files are SVCHOST.EXE in windows/system32/wins and svchost****.pf(i can't remember it's exact name) in windows/prefetch/ or windows/system32/prefetch/, without these files, my system is deadly out of work. anyone can help? thanks a lot,
my OS is windowsXP. could you send these files into my email? [e-mail].