I have recently upgraded from Me to XP. When I upgraded I assigned two users Derek (me) and Carol. I leave the computer on all the time and one morning I saw a message to the effect that the system had crashed and restarted overnight. Everything worked fine except that in the Windows Explorer a right click of the mouse results in a permanent hourglass icon and the system stops. Alt-Cntrl-Delete can be used to close and restart the Windows Explorer, which works fine until I forget myself and hit the right mouse button. However, if I log off Derek and restart as Carol the right mouse button works fine. I have run a full Norton virus check which reported no viruses. Carol thinks my problem is something to do with my administrator rights but I have not knowingly relinquished them. If anyone can help me solve this problem I will be most grateful.