REGEDIT4

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\Display\0000\Settings\GDI]
"DeviceBitmapsCaching"="0"

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\Display\0000\Settings\Engine]
"BusMastering"="1"

[HKEY_LOCAL_MACHINE\Software\Matrox\PowerDesk\Current Settings]
"DeviceBitmapsCaching"="0"

[HKEY_LOCAL_MACHINE\Software\Matrox\PowerDesk\Current Settings]
"Bus Mastering"="1"