davidco When running the scan I get a lot of entries that are meaningless (at least to me) eg. HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\App Management\ARPCache\{09966C32-C34D-4FF4-8C7E-94A9630DDEF8}\ I don't remove stuff that I don't know (recommended by JV) So are they really safe? David
davidco I found someone to explain it to me. PT is correct, by the way I downloaded the free viewer from http://www.superwin.com/arpcache.htm I was then able to do a side by side comparison reading those strange strings. Cheers David