I service PC?s for a living and I?m frequently asked to fix a computer that is running very slowly. After removing the usual culprits with various anti-malware programs, running MSCONFIG, cleaning the registry, defragmenting the hard drive and many other standard speed-up processes, the computer is usually back to its full potential. However, on occasions, I encounter a computer where this only partially helps. Further investigation shows that the hard drive benchmark is less the half of what it should be. More by luck than judgement, I found that cloning the original hard drive to a second drive and then cloning it back fixed the problem and the computer will then run fast again. Can anyone explain this for me?
