In Windows/System32 there should be 3 files, ne is wudmgr, wuauclt &
wuauclt1. If missing you won't get updates.
I had to reinstall my windows xp after a crash. Now when I run windows updates it will not find any. I have tried to install SP 2 but it will not find or update. This is the second time in a year that I had to reinstall windows but the first time windows update found 64 updates and now it will find none. The update screen will scroll the bar across like it is searching but nothing is ever found