my mouse often won't start at boot, and takes multiple reboots to start it off, and when the cpu usage is over 50% it starts acting erratically, sometimes it would die if the cpu usage is too high, I've tried norton antivirus and regcure to fix it, I tried turning off some programs that at startup from msconfig, I tried defragmenting the hard drive, I tried downloading the microsoft mouse driver and I even deleted my old user name, but none of that worked. It started happening after I changed the power supply to smartpower 2.0 (the old one blown out), it's a microsoft comfort optical 3000 mouse(I also tried connecting other mouses to the port, the result is the same), I have xp professional(no update), I put the computer up myself a few years ago(so don't ask what brand it is), plz tell me if u have any idea what has gone wrong to my computer.
any help would be greatly appreciated
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