Note: Upon restarting, you may see a "CMOS Checksum Error." This is normal, as it indicates the settings have been reset. Enter the BIOS to reconfigure time/date and boot order. Potential Risks and Precautions
: Use a tool like Rufus or the BalenaEtcher to burn the ISO to a USB flash drive.
remains a staple, verified solution for system administrators and technicians needing to clear BIOS/CMOS passwords. This article provides a comprehensive guide on how to create a bootable USB, use the tool effectively, and ensure it works on your machine. What is PC CMOS Cleaner 2.0?
Locate a verified public repository or a recognized toolkit distribution site like the Ultimate Boot CD (UBCD) project archive, which frequently bundles PC CMOS Cleaner within its bios diagnostics category.
Choose as your partition scheme for older legacy BIOS systems, or GPT for modern motherboards. pc cmos cleaner 20 usb boot verified
: After the process completes, shut down the PC, remove the USB, and restart. You should now be able to enter the BIOS without a password. Alternative Hardware Methods
The tool is tailored for:
| Feature | v1.0 (legacy) | v2.0 (verified) | |---------|---------------|------------------| | UEFI support | Partial (CSM only) | Full native | | Boot verification | None | SHA256 + signature | | USB 3.0 boot | No | Yes | | Laptop SPI unlock | No | Attempts brute force timing attack |
is a specialized, open-source utility designed to wipe, clear, or bypass BIOS/CMOS passwords, restoring the motherboard to factory default settings. Note: Upon restarting, you may see a "CMOS Checksum Error
The software will automatically run a series of diagnostic scripts to map out the motherboard's core architecture. Once the graphical home environment displays, click to proceed past the welcome screen. Step 2: Choose Your Modification Method
Works on many different motherboard manufacturers, including Dell, HP, Lenovo, and ASUS.
Once you boot from the USB, the PC CMOS Cleaner environment will load. Choice 1: Display Password
Click "Start" to format the drive and write the image. Verify: Once completed, the USB is ready to boot. How to Use PC CMOS Cleaner 2.0 (Verified Workflow) Locate a verified public repository or a recognized
Download link: [insert your verified USB ISO link] How to use: create a bootable USB with Rufus (select ISO mode), boot the target PC, choose “PC CMOS Cleaner 2.0” from the menu, then follow on-screen prompts to view or reset CMOS. Caveat: Always back up important BIOS settings and proceed only on devices you own or have permission to service.
PC CMOS Cleaner only affects BIOS settings, not your hard drive data. However, resetting BIOS to defaults can stop a system from booting if it was using specific settings like RAID or AHCI.
Modifying hardware configurations at the assembly level requires caution.
Insert a clean USB flash drive into an open port on a functional auxiliary computer. Download and launch the latest version of Rufus Official. Choose your flash drive under .