Sometimes I have problems w/ the mouse track. When I go back to work and after the screensaver has come on the mouse track takes about 10 secs to respond. This also happens at times when I start the computer. I call tech service and first they made me reset by pressing p+r+ctrl+apple(?). this did not solve the problem. then thay told me to take battery and power off, Restart the computer but this hasn't solved the problem. Now they tell me to reinstall Osx10.4 before i take it to tech service. Will this help? Or am i just having a usual windows problem?