Don't know if this follows an update or just the Google Toolbar 'flexing its muscles', but I was starting to get a hang on shut-down with 'TRd ww:xxxxx'.
It turned out to be a Google Toobar 'Notifier' and the only way I could get rid of it was with a prog called 'Enditall' which enables you to 'kill' processes that do not appear with CTR-ALT-DEL. It was probably in the registry but I am wary of that
Various web sites had suggested it was other progs causing the problem, but I'm sure it is the Google.