Sounds like quite a fix huh?
Try this....boot the computer with the Windows 7 DVD->Click "Repair Your Computer"->Choose the second radio box and click continue->Choose the command prompt option (last option)->Try the following commands....
net user <desired user name> <desired password> /add
EX. net user SFT password /add
net localgroup administrators <desiredusername> /add
EX. net localgroup administrators SFT /add
If that doesn't work we will try something else!