Since my cd-drive died on one of my computers, I took out the hard drive of it and used it on another computer in order to reinstall Windows XP. The installation went perfectly well and I am able to start Windows XP on the computer where I reinstalled it. But, when i put back the hard drive into the old PC, it loads to the part where the bars go on, and then restarts without opening Windows. I am able though to start it in safe mode. PLS HELP, how can I make it run in normal mode too?