I had a similar problem, and discovered that the restarting cure was coincidental and not reliable. I tracked the problem down to a defect in the cord, about 2 inches from the mouse. When I bent the cord to a position that lit the light, and taped it in that position to the mouse, all was well, and still is. Rob >I am running Windows ME and My compaq Z5000 quits sending messages to my >Microsoft Trackball Optical mouse. The light on my mouse goes out and the >buttons >don't work. If I shutdown and restart the computer it runs for 10 or 15 >minutes then stops sending again.The keyboard commands still work fine. >When I hit control+alt+deleate I get the message that msgsrv does not respond. I >understand that msgsrv is a Windows ME program that controls power >allocation(?) >Is there anyway to replace that file. >I have a second computer with ME on it and it works fine. Could I possibly >use the msgsrv out of it? > >Thanks >[log in to unmask] William L. Carterw The NOSPIN Group is now offering Free PC Tech support at our newest website: http://freepctech.com