Today I booted an image and could not remember the password. I started Googling and found a few solutions. I finally found one that was able to blank out the Administrator password. The project is called Trinity Rescue Kit. It is a bootable Linux ISO image. Once it boots you simply execute “winpass” and follow the prompts. It gave me some scary warnings saying that the filesystem was in use (because I wasn’t able to shut down the image cleanly because I couldn’t log in) and because something called SYSKEY was enabled. I forced a mount of the filesystem and that turned out fine. I also choose the default option for the SYSKEY question (which left it enabled) and that in the end I can now log into the VPC.
Hurray for Trinity Rescue Kit!