My desktop computer won't completely start up. When I turn on the compter it does a disk check. When the disk check is complete, my desktop icons will come up, but only for about 30 to 45 seconds and then the computer automatically restarts and this cycle continues over and over and over again until I do a hard shut down to turn off the computer. I do get a Microsoft message window that comes up on the desktop just before the computer reboots itself. It states "This system has recovered from a serious error." I may have caused this reboot loop by opening a suspect mail and clicking on a link.