My XP Pro can not boot,even in Safe Mode. every time when load mup.sys, freeze about 5 seconds and reboot...?

you need to do a repair install with the windows xp cd. put the cd inside. the first time it ask u to install or repair. go to install. then it will ask u again. choose to repair. if it do not see repair the first time. then cancel the whole setup and get some elses cd