1. Go to Start < Run, type regedit press OK.
2. Locate the registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion
3. Right-click CurrentVersion,add new key and call it  WindowsServerBackup > press enter.
4. Right-click WindowsServerBackup,add new key and call it Application Support > press enter.
5. Right-click Application Support,add new key and call it {66841CD4-6DED-4F4B-8F17-FD23F8DDC3DE} > press enter.
6. Right-click {66841CD4-6DED-4F4B-8F17-FD23F8DDC3DE},add new String Value and call it Application Identifier > press enter.
7. Right-click Application Identifier < Modify.
8. At the Value data box, type "Hyper-V", and then click OK.