I cannot thank you enough! I have been trying to fix this PC for nearly 4 days and have been tearing my hair out, downloaded all sorts of rubbish, paid for 3 "Fix it all" programs and nothing worked. I had no Windows installer, no windows update, no microsoft fix it programs, couldnt locate any registry files or MMC, and ventured into things that I didnt have a clue about. I stumbled across tweaking.com, and thought id give it a go. It has corrected everything, and my PC is like new. THANK YOU so much, and if anyone is in any doubt about this programme, dont be, its fantastic!!!!