(Source: IndiPPC thanks Mally)
Disable menu animations
To disable menu animations (sliding in/out) and speed up performance of the UI a bit:
HKLM\SYSTEM\GWE\Menu\AniType = 0 (DWORD decimal)
To change it back to the default:
HKLM\SYSTEM\GWE\Menu\AniType = 6 (DWORD decimal)
Disable window animations
To disable window animations (minimizing/maximizing) and speed up performance of the UI a bit:
HKLM\SYSTEM\GWE\Animate = 0 (DWORD decimal)
And to switch them back on:
HKLM\SYSTEM\GWE\Animate = 1 (DWORD decimal)