Apparently, if you only set up ONE administrator account, and specified a
password for that account, then promptly forgot the password, you are unable
to reset the password UNLESS you created a password reset CD, DVD, Floppy
Disk, Flash Drive (a.k.a. thumb drive and USB drive), or Media Card (such as
SD, XD, MemoryStick, or Flash/II/III); baisicly any form of removable media
will do (exept tape drives, so don't use those). Also, these password reset
disks are COMPUTER SPECIFIC, so creating one on another computer will not
allow you to reset that customer's password.
If your customer did not do this, then I'm very sorry, but (from what I've
heard) the only way to get his computer back is to reformat the hard drive.
I found this out when I specified a password while CapsLock was on, during
the initial installation (so I never got the chance to make this password
reset CD, DVD, Floppy Disk, Flash Drive, or Media Card) luckly I figured out
what happened and promptly killed the password to my PC.