Here's an interesting one that just started occuring two days ago. Whenever I power on my XP machine (corp edition, no SP), when I click on the START button, XP reboots without warning . During this sudden reboot, it will scan (in this order) the c:\, then e:\, then back to c:\. After it is finished, I can log in and I get the wonderful "Send Error Report" message. Another interesting point is that my ZoneAlarm seems to reset on which apps I allow access to the internet for (coincidence? Possibly). Anyone see anything like this before? Also, anyone know how to view the .dmp files that the error report wants to send? I would like to troubleshoot this but unfortunately, Win XP removed the wonderful GPF error that kinda pointed you in the direction to take