Windows Wont boot up after clearing CMOS

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What mode was your hard drive controller in when you installed Windows?

ATA / AHCI / RAID ?

Resetting your CMOS probably changed it. You need to access your CMOS setup program and change it back to what it was when Windows was installed.

Microsoft says:

The INACCESSIBLE_BOOT_DEVICE bug check frequently occurs because of a boot device failure. During I/O system initialization, the boot device driver might have failed to initialize the boot device (typically a hard disk).

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Updated on September 18, 2022

Comments

  • oaftobark
    oaftobark over 1 year

    I cleared my cmos and windows cant boot up. it says inaccessible_boot_device how can i fix this? btw im using a ssd for windows and a hdd for other stuff

    • Admin
      Admin over 7 years
      are your SATA buses configured for AHCI or ATA? what happens if you switch it?
  • oaftobark
    oaftobark over 7 years
    i removed my hdd sata cable to another slot and it got fixed. also i changed it to RAID mode again thanks for help
  • oaftobark
    oaftobark over 7 years
    i tried removing ram but it didnt had an effect. but i removed the hdd and it worked! thanks so much.