Hi everyone, Could anyone offer a little insight as to ways to determine what exactly is changed about a file or what did the changing if you receive a warning that is unexpected? Recently installed a screensaver that was not very well-behaved. Got warnings about checksums changes to various monitored files such as virusscanner and Spyblocker and several others. Scans by Norton and TDS came up empty, as well as checks with several utilities that I use on this system. Do not think this was any kind of false warning as the same thing happened on several tries. Goback was used to turn the clock back between installs, so each install was fresh. Eventually dumped saver. This was easy as the originator of the problem was known, but in the event there is a problem with an unknown entity, a little knowledge could maybe save a lot of aggravation! TIA.