My PC has been running at 100% CPU since installing SP2. I run Windows XP and since the installation of SP2 it boots and if I bring up Task Manager.. it shows explorer.exe at 100% cpu... Can anyone help? I've run Trend Micro PC scan, Ad-aware and so forth and still cannot figure out why it's doing this! Any ideas would be greatly appreciated. Thanks

I have seen this happen when you have video files that get previewied in Windows Explorer. Basically, explorer is taking time to render the AVI file for preview. I have also seen one of the DIVX codecs continually crash Explorer when the file when Windows is trying to preview the file.

This link has two fixes that can be used if this is the issue:
http://forums.spywareinfo.com/lofiversion/index.php/t884.html