One big disadvantage of using PC Login Now is that, by the very method it uses to remove the password, it causes Windows to detect a possible data corruption issue. Windows will run a file check to make sure nothing is damaged.
While you do have the option to skip these disk consistency checks, I highly recommend that you choose to complete them on every disk that Windows wants to perform the test on.
In the next step, you'll finally get to logon to Windows without entering a password!
Important: I've used PC Login Now several times with many clients and I know lots of readers have used it as well. I have never encountered any problems that I could attribute to PC Login Now. However, please use this and all software I might recommend at your own risk. If you're reading this before using PC Login Now, and this makes you nervous, try Offline NT Password & Registry Editor instead.