My computer has been acting weird lately with pop ups and websites appearing telling me that I might have a virus and need to download their software which seems to activate my download manger. I do not download but can't get rid of these. i also get a box saying iexpolrer.exe application error numbers then memory could not be read "click OK to terminate program" I press OK, then get runtime error message but IE doesn't actually shut down. i haver scanned with Avast professional and adawre 2007. they found malware removed but does not seem to make adiffrence. Also certain websites slow right down e.g. google. Any suggetsions?

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