Windows 8.1 VM won't start

I got my iMac yesterday and purchased parallels to be able to run my windows applications on the mac. I used the the transfer method for creating the VM but each time I try to start the Windows 8.1 VM it sits for ages saying :
Upgrading windows 8.1
Preparing to configure your virtual machine
The screen then changes to say 'preparing automatic repair' and asking me to log in but I cannot see how to go any further.
Please help.
Thanks

 

Hi Russell_Hughes,
This issue occurs if Migration from Windows PC was not done properly either over Network or External Storage. We suggest you to follow the instructions given on this link kb.parallels.com/113269 before initiating Migration from Windows PC.
Please feel free to reach us, if you need any further assistance. We're here to help you.