Are you trying to configure for a new OS?
and immediately start pressing the F1 key (or Del key, depending on your specific model) repeatedly to enter the BIOS settings. For ThinkCentre models, F1 is commonly used. lenovo thinkcentre m720q bios password reset
Follow this sequence exactly. Deviating from these hardware steps can cause a boot failure or fail to clear the security parameters. Step 1: Disconnect and Power Drain the System Are you trying to configure for a new OS