question about C:windows/system32/svchost.exe cannot load

When winxp boots up I get this error message at the begin “c:windows/system32/svchost.exe cannot load.” Everything else on winxp works fine. Does anybody know how I can fix this error. Please help! Thanks You!

Go to Command Prompt, and enter the command sfc /scanfile C:\windows\system32\svchost.exe
It should scan the file for problems and repair if neccesary.