Vista - Odd folder error?

Had problems with Nero 7 where it just stopped working when I try to
make any sort of disc using the built in file manager where it just
stops working. A suggestion was to upgrade to Nero 8.

OK now I've even tried Nero8 and I still get the same problem!! I am
wondering if this is a permissions thing now? I updated from XP and
had a few problems sharing netrowk drives but sorted all that. I have
just realised that the problem only happens when I try to go INTO a
directory which contains any files. I can navigate through directory
structures which only have folders below them but as soon as I try to
go into one which contains any files, Nero stops working! Nero Express
is fine and I can use the normal Nero to burn ISO files fine.

Any ideas please?

cheers,
Len