It started when a customer of mine tried to load NIS2005 over NAV2002. Didn't work so he did a system restore, effectively removing NIS and putting NAV back on. However I'm sure there was a jumble of files left over from each. I came in and COMPLETELY wiped ALL traces of Norton from the hard drive and registry. Scanned for viruses and spyware, startups etc... Then successfully reloaded NIS2005 and it's all working, system is clean. He has very few startups. The only system tray icons are Volume, MSN, Epson status, and NIS2005. The problem is, it won't shut down or restart. But once in a blue moon it will. It goes to the screen where XP says "Windows is shutting down", and will either freeze there (can't move mouse) or just doesn't go any farther. I have to hard boot it. It's an HP Pavilion 552x so I get no restart button. I believe XP is successfully shutting itself off, it just isn't powering down. Because XP doesn't tell me I had an invalid shutdown. Now here is the "very strange" part. Most of the time I can shut down through "Start-shutdown" and it will work. But it almost ALWAYS freezes there if I shut down through a dialog box. As in change to MSCONFIG or an update or something. If a dialog says "Click OK to shutdown now", it will freeze like I said. But if I cancel and use the Start menu, I get a 50% chance it'll work. So then... Like I said, I've cleaned it up for internet related stuff. I've turned off Sound Scheme, I've checked there are no duplicated drivers or anything like that. I've checked power management. I've changed the registry key "PowerdownAfterShutdown" from "0" to "1". What's weird is that it never had this problem until the restore and reinstalling NIS. BUT, even when I totally striped NIS and NAV out of there, it was still doing it. So it MUST be a problem with Windows. However, I didn't do anything to Windows. As in, it couldn't be a driver problem etc... I've gone through various "bad shutdown" web sites and tried a dozen fixes, nothing works. And again, it seems to be way worse when restarting from a dialog box. I find it interresting too that the mouse freezes. I think XP is just a millisecond away from powering down but is missing one thing to do it. It's driving me MAD!!! Xp Home SP2 and all updates 256mb (minus 32 shared video) onboard everything except modem P4 1.60ghz Well guys, any suggestions? Thanks.