Windows 7: Media Center Stops Responding after 10 min watching tv

Hello all,

i have the following problems:
when i am watching tv from media center and i dont change the channel for about 10 min, media center freezes the channel you are watching at that moment plays further but i can change only the volume, you must shut it down with task manager, if you start media center again its happend again. there are no problems when playing music and watching pictures.

there is 1 suspicious alert in the logs, software protection service stops.
i have the latest drivers and updates ( it is a clean install )

i have the following hard / software:
- Origen AE T21s ( touchscreen on vga )
- windows 7 enterprise x64
- asus P5Q pro mainboard
( 1 try )- Nvidia 9600 GT ( 2x DVI, using a DVI to VGA and DVI to HDMI )
( Problem with drivers of nvidia cannot duplicate tv with touchscreen )
( 2 try ) - ATI HD5670 ( using vga to touchscreen, hdmi to TV )
( Problems with the quality of tv image - ghosting, this can be fixed with a reg key, - duplicate screen resolution of the tv not full screen )
i have not installed ATI AVIVO / Hydravision is this a solution ?
http://apcmag.com/how_to_fix_video_smearing_blurring_and_ghosting_on_ati_video_cards.htm
- Philips cineos 37PFL9642D 50" LCD TV ( on HDMI )
- Floppy DTV Cable version ( Digital TV on firewire )

You're not runningout of hard drive space are you ?

i think it has someting to do with the x64 drivers of the videocard / tv card..

it was not the hdd space ( new install )