I was trying to install "over the top" as many has said works fine here with problems. I am upgrading from the 2.51.20 to the 2.51.26 version (Win XP Pro). I have tried twice "over the top", and also did and uninstall, deleted ESET folder and any few leftover registry keys, but still receive the error. I have to restore my system to a previous image in order to get NOD32 back but am still not able to get the newest version to install no matter what I may try. Attached is a screenshot of the exact error I receive each time. I have searched the forum but only seem to find vague reference to this problem. Can anyone help?