All pocket pc users will know that tapping on Start pulls down the menu with animation effect. For some people it may be a little incovenient to see this animation all the time. Well..it can be disabled with a very simple change in registry and doing a soft-reset for the change to take effect.

Use your favorite registry editor (mine are PHM Registry Editor available at http://www.phm.lu/Products/PocketPC/RegEdit/ and Remote Registry Editor which comes with Embedded Visual Tools)

Look for the following registry key
HKEY_LOCAL_MACHINE\SYSTEM\GWE\Menu\

And change the AniType value to 0 instead of default 6.

Do a soft-reset and you will no more see Start Menu animation

source- www.askarya.com