Fiz algumas buscas no google e existem muitas pessoas com esse problema ou semelhante e sem resposta ou resolução, no último post do link abaixo tens um link do piratebay para uma espécie de aplicação que te pode ajudar:
http://social.technet.microsoft.com/for ... 026c96c8e/
EDIT1:
Mais coisas que podes tentar:
maybe you can try by creating another administrator account and try to use this .MIG file within that account.
Try, disable all the firewall and security services.
Also, you can try to perform this action by just using keyboard and mouse with the system. No external hardware device.
Also, try to save this backup file on your system and than try to access it.
EDIT2:
Parece que pode ser a solução:
After starting the wizard, when you are at the dialog where you choose the MIG file to restore from, you need to manually create this folder:
"%userprofile%\AppData\Local\MigWiz\WorkDir\srcworking".
If the same user will run the migration wizard the path was
C:\Users\MY USERNAME HERE\AppData\Local\MigWiz\WorkDir\srcworking.
The path %userprofile%\AppData\Local\MigWiz\WorkDir should already exist.
http://social.technet.microsoft.com/for ... aae3964b5/