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Computer got slower since installing windows 7?

Recently I installed windows 7 sp1 to my computer. I used to have vista installed. I realized that my computer got slower after installing windows 7. I did use windows 7 before on the same computer. The windows experience index score of my processor was 7.0 and my ram was 7.2 the previous time I installed windows 7. Now they are 4.4 and 5.6 while hard disk and graphic scores stayed the same. I also realized that I can't select 4 processors on boot options. ( I have an amd phenom 9750 quad-core 2.4 ghz processor. and 8 gb of ram) Can anyone help me on this?
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  1. 1) did you install all mobo drivers?
    2) are all cores of your CPU showing up in hardware or task managers?
    3) what speed is the CPU set at?
  2. CaedenV said:
    1) did you install all mobo drivers?
    2) are all cores of your CPU showing up in hardware or task managers?
    3) what speed is the CPU set at?


    Yes i did install all drivers.
    unfortunately i cpu-z shows only 1 core. The speed is still 2.4 ghz but only with 1 core. Is there a way to fix it?
  3. Best answer
    It looks as if the win 7 install installed the wrong HAL (hardware abstraction layer). You might be able to use the device manager to force change it, but a clean (re)install would be best.
  4. Yeah a re-install did the work. Still pretty weird though that windows couldn't see all of the cores.
  5. Best answer selected by wisegun.
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