PC CMOS Cleaner is a free, downloadable software tool that specializes in cleaning and resetting CMOS settings. This utility is designed to work with a wide range of motherboards and can be used to resolve various CMOS-related issues.
: Laptops often utilize specialized, hardened EEPROM chips for security. PC CMOS Cleaner is largely ineffective on laptops. Safe Alternatives to Reset a Modern BIOS
This tool is heavily outdated and largely ineffective against modern UEFI passwords stored in non-volatile EEPROM chips. The Better Alternative: Physical CMOS Resetting Methods
Every desktop motherboard features a dedicated jumper pin set designed to clear the CMOS memory. Power down the PC and unplug it from the wall. Open the side panel of your computer case.
No software needed.
A PC CMOS cleaner is a tool designed to reset the BIOS/UEFI settings to their original factory state. It wipes the CMOS memory, which contains:
A: Yes, though the risk is relatively low if you follow instructions carefully. The most significant risk is with laptops that store passwords in EEPROM: using a CMOS killer command ( /k ) can corrupt the EEPROM's checksum, potentially causing the BIOS to lock permanently.
It bypasses operating system restrictions to clear the CMOS checksum directly.
Look for a coin-shaped CR2032 battery on the motherboard. pc cmos cleaner download
: Follow the on-screen prompts to either display the current password or clear the CMOS settings entirely to remove it. Safety and Alternatives
PC CMOS Cleaner is a legacy data-recovery utility designed to reset, recover, or wipe the BIOS supervisor and user passwords. It works by clearing the computer’s Complementary Metal-Oxide-Semiconductor (CMOS) volatile memory, which restores the BIOS to its default factory state. Key Features of the Utility
The software will scan your motherboard and display system information. You will see a list of choices:
While removing the CMOS battery is a common solution for desktop computers, it often on laptops. As noted earlier, many laptops store BIOS passwords in a separate, non-volatile EEPROM chip, not in the battery-backed CMOS. Removing the battery may only reset the date and time while leaving the password fully intact. In some cases, attempting this procedure can trigger additional security locks. For laptop-specific issues, manufacturer tools or professional service are often necessary. PC CMOS Cleaner is a free, downloadable software
This guide will walk you through the best PC CMOS cleaner download options in 2026, how to use them, and the safest ways to reset your BIOS. What is a PC CMOS Cleaner?
If your PC is failing to boot, won't display a picture (No POST), or if you’ve forgotten your BIOS password, you likely need to "Clear CMOS". The CMOS (Complementary Metal-Oxide-Semiconductor) is a small amount of memory on your motherboard that stores BIOS/UEFI settings, including hardware configurations, boot order, and system times.
Are you currently able to , or is the PC stuck on a black screen?
Congrats! You have your own personal workspace now.