This is an error that occured while trying to install some software. Drive I:/ is an external hard drive that a mate downloaded a pile of updates to for me (net connection for that computer has crapped out). I installed the updates (mostly anti virus and a few patches). But when trying to install a program I got the above error and installation aborted. The installation would only prgress when drive I:/ was connected. I carried out a google of the error, downloaded Eusing registry repair, carried out a disk cleanup, de-frag the disk etc. No joy. I then was directed to the microsoft website where I read the following passages:- and . Now I sort of understand the first but haven't got a clue about the second. When I tried out the first option all the entries either had a c:/ or a %user% as the first part of the file path. I have no idea if this is relavent or significant. Help greatly appreciated.