I am having a problem with Windows XP in which the machine will begin to load up and after the Windows XP logo screen it has a blue screen that states autochk program not found - skipping autocheck and then reboots over and over again. I have tried changing one of the registry keys as someone else suggested and that didn't work. I have also copied mountmngr.sys and autochck.exe from an XP installation CD into the appropriate folders without any success. Any ideas?