Windows 7 Bitlocker - recovery fine - unable to logon (no keyboard input)

Hello folks  - hoping you could help with this issue.  I have recently peformed a backup and then a restore of a Windows 7 Enterprise installation with BDE & Bitlocker.  The backup and restore appear to work normally (as indicated by the many threads on this forum) - however the system boots up fine and "CTRL + ALT + DELETE logon"  screen appears but it does not allow a logon to start.

  1. no keyboard input is available
  2. no mouse is available
  3. only when power button is pressed, system shutsdown gracefully.

Another interesting fact - It appeared that the system was functional from the disk activity etc. so I decided to connect to the network and RDP into the system.

  1. I could connect with an RDP session and my initail credentials started a full screen RDP session but the only option was a CANCEL button in the middle of the remote session after it was sucessfully established.

This would indicate to me that for some reason Windows 7 is disabling the logon functionality and not some recovery faiure.

  1. The system is up and running otherwise I could not establish a network RDP session
  2. The system keyboard and mouse worked fine in the Bios and startup screens (i.e. F8 at startup or Bios)
  3. The system config has not changed other than a new hardrive with the recovered image.

Any thoughts would be appriciated.