XP is slow in normal mode but fast in safe mode?

[KK]

I checked device manager to see if it was the audio driver.Every thing was ok there was no hardware conflict.I've restored it twice as well as defragmented and disk clean up.I did a full scan with norton and nothing was found.I am not sure what else to do.It is sooooo slow to open any program and crashes on some installations.I booted it up in safe mode and everything was fine.Also when ever you move the tower it will immediately shut down then reboot.It is windows xp home edition. How do i fix this????plz help!!

 

[J4mmy]

Download Advanced Systemcare 4 from IObit, install it and run the quick care. Report back with the results.

 

[sahabcse]

Try this, boot into normal mode.
Start > Run > type msconfig system configuration utility
Should bring up
Click on services and uncheck everything which doesn't have Microsoft Coperation as the manufacturer and reboot

 

[cyganista]

Also with the same tool uncheck unneded applications in startup.