GG - thanks for the extra info some of which I had not seen - problem is I have 'none of the above' on my system. The Blog link I saw on Thursday by which time I had removed the reg keys, reinstated safeboot with the reg plug-in I mentioned and confirmed those files did not exist. A real puzzle. Running 'Super anti-spyware' at the moment.
Bizarrely too, if I boot into 'Administrator' I get Documents and Settings\Administrator\Application Data\drivers but without the 'downld' folder!