Sometimes you encounter a PC that when you look at the task manager, you go ‘holy cow!’, it’s running on 100% disk usage for a long, long time.
Believe me, that’s quite normal but solvable.
Here are the steps that I did to help bring it down.
1. Press + R and type devmgmt.msc in the Run, hit Enter key to open Device Manager snap-in.
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2. In the Device Manager window, expand IDE ATA/ATAPI controllers and right click on Standard SATA AHCI Controller, select Properties.
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3. In the property sheet, switch to Driver tab and click Driver Details.
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4. If the Driver File Details window shows storahci.sys driver listed there, it means you’re running inbox driver and hence it is possible to disable MSI mode. Click OK.
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5. Back on the property sheet, switch to Details tab. Against Property, select Device instance path from drop-down and note down the Value mentioned there.
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6. Press + R and put regedit in Run dialog box to open Registry Editor (if you’re not familiar with Registry Editor, then click here). Click OK.
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7. In the Registry Editor window, navigate to following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\PCI\<AHCI Controller Value>\Device Parameters\Interrupt Management\MessageSignaledInterruptProperties
Substitute <AHCI Controller Value> we got in step 5.
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8. In the right pane of MessageSignaledInterruptProperties key, look for the registry DWORD (REG_DWORD) named MSISupported which should be corresponding to Value 1 as its Data. Double click on the DWORD to modify its value:
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9. Finally, set the Value data as 0 and click OK. Close Registry Editor and reboot. After restarting your machine, the 100% disk usage problem should disappear.
Thanks to this link
https://www.kapilarya.com/fix-windows-10-100-percent-disk-usage-problem
Enjoy
Coffee Cup