Don't know why but the last two days I've come home, my PC has been locked up tighter than the preachers daughter in church. The first day, my dial up connection was on and I thought it might have something to do with that. Today, I closed all programs that were open previously (MSN connection, copy/fax program for Lexmark X83, print icon for Lexmark X83, analogx proxy) and when I came home it was locked up on the Windows XP default screen saver. I've already checked power management and the only option that was set was to turn off the monitors after 20 minutes. I checked heat related issues and the processor is stickin right around 50C at most. Don't really have any other thoughts off the top of my head

Gigabyte GA-7VAXP Ultra
XP 2100+
Maxtor 20GB on SATA as primary
Maxtor 80GB on ATA primary slave
Liteon 32X CDRW on ATA secondary master
512MB Crucial PC2100
AOPEN 300W PS
Gainward Geforce4 TI4200 128mb Golden Sample