See, this is why I never recommended using an automatic installer in the first place. There is just too much bloat and overhead associated with such (how hard is is to boot into DOS, copy a single file, and then reboot?), and if something goes wrong, whoever installed it in the first place now has no idea how to uninstall, because you need to have Windows functioning to use the (rather useless IMHO) "uninstall" feature. On the other hand, following my procedure, she would know to copy back the original file, and it is done in DOS which practically runs on every PC in existence. Also, this is why I recommend replacing your ESDI_506.PDR with the fixed exact same version, and also why I don't recommend using newer versions just because they claim certain benefits. Don't fix it if it ain't broken.