I must re-iterate that these are not Skimlinks, they have nothing to do with DIYnot and are not under our control. However the screenshots do give some clues and I suggest you visit here for information on how to remove this add-on from your browser.
Admin, I agree with you it certainly looks as though I pick up malware, must be from a link on 1 of 3 forums, although I suspect image shack may be the best place to look.
have found widgi toolbar platform which is certainly the problem, and will post back later possibly tomorrow when I remove it.
Can't find what I'm looking for in regedit, and have to go out, so TTFN