Hi people I'm not overly savvy with the complexities of the windows operating system because when something goes wrong it is so friggin difficult to find out why. I have a p4 2.6ghz with 2 gig ram and 256 k video card all running beautifully. Only issue is when i do a reboot after installing software it cannot find the startup disk. I have to switch the machine off then start it again and it works fine.(cold start) Why does it do this only on reboot but not from a cold start? It's a recent phenomenon and not something old. All virus and spyware are up to date and I have found no issues and I rarely use this machine online anyways. Can someone explain in laymans terms what may be causing this? cheers.