I have a Dell iInspiron 1300 with 1.3 Celeron M Win XP Pro. I changed the DVD drive while the machine is still on! Now, it take a long time to bbot, it runs very slow. I checked task maanger the CPU run at 100% a lots of time with either AVG * or system idle in process, no program run on program check. All programs run noticeable slower with high CPU usage, one example, sound becomes scratchy most of the time when paly a video. I update the bios, scan with AVG all OK. Any suggestion will be great. Does laptop has button battery? Could it be low? Did I short something? The DVD works fine, everything runs just sloThanks