Step 5: Boot to BIOS and re-enable UEFI boot Temporarily rename CMD - Copy.exe to: UtilMan.exe (this is what we will use to reset the local admin password)Īt this point we are done in Linux/Hiren's. *IMPORTANT* Locate utilman.exe and temporarily rename it to Ĭopy CMD.exe and paste it into the same directory: C:\Windows\System32 Once in Linux or Hiren's, open C:\Windows\System32 on the hard drive of the locked out PC. UtilMan.exe is for "Ease of Access" (AKA universal access), but can be exploited as a backdoor (with physical access to the machine). This is the "hack" that makes all of this possible. Step 4: Temporarily replace UtilMan.exe with a copied and renamed CMD.exe Tapping F12 at boot typically displays a boot select menu. Typically under Security or Advanced settings). Check your machine's manual or simply Google "how to boot (make) to BIOS."ĭisable UEFI "secure boot" (location of this setting in BIOS varies by manufacturer. If F2 key doesn't boot to BIOS, it's usually F1, F10, DEL or ESC. Step 2: Boot to the machine's BIOS, disable UEFI boot and change boot type to CSM A flash drive with a bootable Linux "live" OS or Hiren's will accomplish this. You need admin access to the file system of the locked PC. Step 1: Create (or locate) a bootable Linux USB key/CD or Hiren's boot disk. Modified on: Wed, 17 Apr, 2019 at 1:05 PM
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