Need some help. Daughter at college with Dell XP Pro laptop. Normally connects in her room through LAN card. PC has wireless card as well. After working without a hitch for months, PC suddenly got very slow. I had her to do a cntrl-alt-del and found that Winlogon.exe was pushing processor to 100% usage. I had her to stop all active programs (AIM and Outlook). No effect. I had her to disable the wireless card. No effect. I had her to unplug the LAN cable. No effect. I had her to shutdown and reboot. No effect. I had her to shutdown, disconnect the LAN cable, and reboot. AAAAHHHH.....CPU at 8%. She then reconnected the LAN cable, and unit works fine. That's now the pattern: so long has she connects the LAN cable after booting, no problems. What's going on here? Bad driver? Problem on the school network? Unit has been checked for viruses, with latest Norton definitions. No viruses found. Unit has been defraged. I'm stumped.