You can do anything (in a closed test environment i have installed vontu on a windows 2003 with 512MB of memory), the question is what would happen when it would stop working.
Hyper-V is Unsupported, which means that it could/should work BUT if you run into any problem there will be no one to help you.
I would suggest you use certified Symantec servers (VMware or physical servers).
Kind Regards,
Naor Penso