I am having problems booting up, getting the windows failed to start screen each time. If I opt for repair, Windows is unable to repair, and if I opt for normal, Windows starts up. However it starts very slowly and I seem to be unable to install new programs to then work properly (I have recently tried FileHippo Udpate Checker and Secunia PSI but they won't run). I think I must have damaged something while removing a virus - possibly with ComboFix. I have run Checkdisc several times and done other bits and pieces that I've seen might help, but with no noticable improvements. I don't know what to do, so any help would be much appreciated.... Thanks in advance!