Neowin.net posted : Hi guys! I know theres a bunch of people out there suffering the same problem as me after upgrading to DX9 under Windows XP: Windows Messenger goes screwy! Well, I've since figured out a temporary solution until Microsoft fixes the problem, so I thought I'd share! Problem:

After upgrading to DX9, Windows Messenger takes a while to load and/or will intermittently freeze every 30 seconds or so for a few seconds before returning back to normal.

View : detail from Neowin.net