How to Fix CMOS Checksum Error Preventing Boot

Check AND them Or for each CMOS battery change, add for a CMOS checksum error. Restore the BIOS settings to default so that you can correct the CMOS checksum error. Update the BIOS to correct the CMOS checksum error. Can Windows Update corrupt BIOS? Based on the exact UEFI specifications, it shouldn’t be possible to …

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