Just a slowdonw or the application crashes or fails?
Did you try adding it to the Standard Shield Exclusion list? Left click the 'a' blue icon, click on the provider icon at left and then Customize. Go to Advanced tab and click on Add button.
Can you post the contents of this Windows Registry key in that system?
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\VirtualDeviceDrivers\\VDD
Also, can you check the file C:\Windows\System32\Config.nt and post the last lines (not the comments).