Dear Friends, My new ( 2 weeks old)PC with intel i7 processor , intel® Desktop Board DX58SO with 4gbDDR. It was showing some problem even from the beginning during installation of XP. Repeated blue screen. After doing chkdisc and removing one of the RAM s ( from 6 GB to 4 gb) i was able to install XP. I installed antivirus and updated windows. I updated the bios also Now when i connect my ext hard disc of 1 tb or of 160 gb. it automatically restarts. But not always. Most of the times it is when I am just connecting the usb. What should I do?