Windows XP attempting to boot, stops with error msg (in Safe Mode also)"missing/corrupt ISAPNP.SYS file" error msg specifies \system32\DRIWERS, not a typo, is DRIWERS instead of "Drivers". The file is located in the Drivers folder, apprehensive about using XP CD to repair or do in place upgrade. Recently McAfee techs worked remotely on computer, suspect was typo on their part or malware. Where can I modify this path name? Or what is best approach to repair without reinstalling everything? Thank You!