Sluggish and sometimes unresponsive PC

  GBL 09:40 22 Aug 2013

Both my laptop and desktop PC are on Windows 7, different versions, now after a few years use are getting, at times, slow and unresponsive. I use CCleaner regularly but that does not cure the problem. Is there any other free to use utility that will help clear out unwanted residue, such as AVG which despite using the removal tool is still there. I have other bits which I cant remove as it asks for the Administrator, which is me even after I have changed ownership.

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