I searched a lot about this online and couldn't find a solution, I turned off fast startup as many answers have suggested. But it didn't work , The problem happened after I connected a secondary hard drive to my laptop removing the dvd drive , whenever I remove the secondary hard drive , above processes act normal. I have a SSD as my primary drive , the problem happens only when the secondary drive is connected , I desperately need a solution since this is killing my computer.


This is a known issue. To use a hdd in the DVD slot, you used a HDD caddy. In some cases you get a high CPU usage caused by the ACPI.sys driver.

You have to look if your caddy has a jumper and if yes, change the position of the jumper.

enter image description here

This fixes the CPU usage. If you don't have a jumper, buy a caddy which has such a jumper.

  • 1
    Totally fixed the issue instantly! Thank you very much , we need more people like you in this planet. :-)
    – lasan
    Dec 3 '16 at 9:07
  • But what does the jumper do, technically?
    – user1686
    Dec 3 '16 at 20:53
  • @grawity I'm guess, to make it master or slave drive ?
    – lasan
    Dec 4 '16 at 6:17
  • 3
    @grawity this "Device Attention" pin which is used in Win8 for some purpose: msdn.microsoft.com/en-us/library/windows/hardware/… . I thinl the jumper just turns this off Dec 4 '16 at 7:27
  • 2
    @lasan That does not exist in SATA.
    – user1686
    Dec 4 '16 at 8:52

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