On many XenDesktop installations with Windows 7 VMs I ran into a problem regarding the mouse performance. The mouse seems to be quite slow and slaggy if you’ve loaded the Win7 Aero theme.
This is caused by the mouse scheme “Windows Aero”. You need to disable this either in the default profile or via group policy preferences during login:
HKEY_CURRENT_USERControl PanelCursorsScheme Source Scheme Source=dword:00000000
I assume that the same setting is gonna work on Windows 8 based VDI machines, but I don’t have tested this so far.