message appeared after no current changes in system."multiple changes have taken place since windows was originaly installed. You must re-load windows within the next 72 hrs. I followed the prompts, it verified key numbers and re-installed. I now have no network connection and the device manager shows no devices, just blank.I read that this may be due to the windows program not being activated. I cant try to re-install again due to the fact I cant find my XP cd. Is there a site that will allow me to down load XP Prof. to a disk from a different computor, and then re-install again. Any suggestion woujld help