The BIOS/CMOS/EFI password is the password without which it is not even possible to boot the operating system (e.g. Windows). In this case, for desktop computers, the problem is usually solved very simply: on older computers, remove the motherboard clock battery, wait 10-15 minutes and restore the factory settings. In newer versions, the motherboard is searched for certain shortcuts (Jumpers), the combination of which is reset to the factory settings. However, the most modern versions of the boards, often designed for business use, have the highest level of protection. This protection is also commonly applied to laptops. No amount of removal of the watch batteries or short circuits can help. In this case, the BIOS CMOS chip has to be soldered and reprogrammed or even replaced with a new one. For certain models of computers, it is still possible to generate a recovery password with the help of special programs or by contacting the manufacturer directly.
If the operating system is forgotten (Windows / MacOs / Linux) user password In some cases, with the help of special programs or by logging in in administrator mode, it can be removed without restoring the operating system. However, in the worst case it may be necessary to simply reinstall or restore your operating system again.