|"...have forgotten password to access pc..."|
If the password was set in the mboard's bios Setup, Windows has nothing to do with that.
- if it's a password you must supply while booting the computer to use the computer at all, as in, you can't even access the bios Setup while booting until you provide that, that's a system access password that was set in the bios Setup.
- if it's a password you must supply to use the hard drive, as in, you see the normal graphics while booting and can access the bios Setup, then you are asked to provide a password in order to use the hard drive BEFORE you see the Logon screen for Windows, that's probably a hard drive access password that was set in the bios Setup, although there is third party encryption software available that can do that.
If you have a desktop computer, in most cases you can remove the password(s)
- if you remove the Cmos battery from the mboard , then re-install it - if it's in a socket that's flat on the mboard the + on the top of the battery must be visible when it has been installed
- or - if you clear the Cmos by moving a jumper to a certain position, then moving it back, or if you briefly short a specified two contacts to clear the Cmos if there is no jumper / pins
The first time you boot the computer after that, you will get a "Cmos Checksum Error" message or similar - you must go into the bios Setup and set at least the Date and Time, Save bios settings, to get rid of that message while booting the computer.
If you have a laptop or netbook computer that was made in the last twelve years or so, the password info is NOT stored on the bios chip - it's stored on a separate chip that's soldered into the mboard and that cannot have it's custom settings deleted by removing the power to it.
Anyone who answers on this web site is not allowed to help you with that, other than by telling you to contact the maker of the computer.