I'll bet some of you just knew that Java had something to do with it, didn't you...
The computer with the slowdown issues is on an APC UPS. It uses Java software to control the graceful shutdown. Guess what? APC's Java Runtime Certificate expired on July 27, 2005 for this version of the software.
Bottom line, if you're running APC's PowerChute Business Edition software v6.x, you need to upgrade to the latest version (7.0.4).
More [link|http://nam-en.apc.com/cgi-bin/nam_en.cfg/php/enduser/std_adp.php?p_faqid=7202|here].
Of course, I was 90% through reinstalling and reconfiguring things before I found this out...
:-(
HTH someone else out there.
Cheers,
Scott.