Thanx for ur reply guys...
1. It does not go through the process.. It suddenly Swithes off..!!
2. It does not happen with certian programme.. For Example if i play a song it does not hav any problem but if i use msn msg...yahoo msg ...winamp and surf at the same time suddenly it switches off..!!
Its a P3, 1.7ghz, 256mb ram.. Windows xp...!!