hi' i'm hopeing some one out there can tell me what I have to do to get a 3d screen saver to work. i have a hp pavillon a630n desktop. when i tried to install a new 3d screen saver program I get the message no direct 3d device found. i'm lost, don't know what or where to begin. maybe this computer didn't come with a 3d device ? any help would be appreciated . thanks