if your system is a VM, so you have to tweak your VM settings forcing it to boot on the 'Offline NT Password & Registry Editor' ISO file (to do so: press the F2 key very quickly, as soon as the VM starts). just follow the on-screen instructions and crack the local administrator password (the new password will be reset to blank) if your system is physical, boot on the 'Offline NT Password & Registry Editor' CD and that would do the trick. Then the only reliable (and last) solution you have is using free 'Offline NT Password & Registry Editor' (), regardless your system is physical or virtual

you just can't login while you are desparate to. you have no idea of what the local admin account password is you are unable to log on locally with any account you may know The VM is in Workstation mode (did not join any domain)