CMOS Checksum error

What is CMOS-CHECKSUM-ERROR?

The CMOS-CHECKSUM-ERROR error is categorized as a medium-severity hardware BIOS/UEFI issue that can significantly impact your PC's stability. BIOS detected invalid data in CMOS. Settings have been lost. When experiencing the CMOS Checksum error fault, users often report sudden system crashes, unresponsive behavior, or a blue screen of death (BSOD). In most diagnostic scenarios, this problem is directly triggered by underlying hardware or software complications such as low cmos battery, reset bios and power failure. To permanently resolve the CMOS-CHECKSUM-ERROR issue and prevent further system degradation, it is highly recommended to follow our step-by-step troubleshooting guide below, ensuring your hardware BIOS/UEFI components are functioning correctly.

Common Causes

• Low CMOS battery
• Reset BIOS
• Power failure

Step-by-Step Fix Guide

• 1
  Replace the CR2032 battery

  Applying the first fix (Replace the CR2032 battery) addresses the most common root cause of CMOS-CHECKSUM-ERROR and restores baseline functionality.

• 2
  Reset date/time

  If the problem persists, proceeding with the remaining steps ensures all edge cases related to bios instability are covered.

• 3
  Save the BIOS settings