HP DVD Play - Vista Media Center: blue border

[TD]

Hi, I have an HP Slimline s3330f vista media center (VMC), running HP DVD Play (v2.42 build 5820).  It plays Blu-ray.  I have it connected to TV via HDMI and I have digital audio (S/PDIF) going directly from s3330f to my digital receiver. 

Blu-ray discs do play though VMC when I select the "HP DVD Play" item from the VMC ribbon.  The problem is there's a blue border around the movie.  It's as though the movie is not playing in full-screen (there's a 2" blue border).  Now, I know that this blue border is the VMC screen in the background.  Also, as a test, I stopped VMC, and launched HP DVD Play directly to play a blu-ray movie - it works perfectly. 

Any idea how to get rid of the blue-border (in other words, make HP DVD Play use full screen when VMC is running)?

Notes: 

-VMC setup to use a flat-panel widescreen TV

-VMC is setup as 1080i

-nvidia drivers are setup to 1920 x 1080 res

-nvidia drivers are setup to use HDTV 1080i (and I've also tried 1080p, 1080p/24, same result).

[TD · Accepted solution]

Ok, I seemed to have fixed the problem.  However, I did a handful of changes and I'm not exactly sure which change really fixed the problem.  Here's what I did:

- updated to latest Nvidia drivers

- removed the Realtek audio drivers and reverted to the default Microsoft HD Audio drivers (this, BTW, got DD 5.1 to work via S/PDIF)

- implemented the registry changes (see here:  http://thegreenbutton.com/forums/thread/278165.aspx )

- re-installed HP DVD Play (latest version)

I suspect it was the registry changes that fixed the issue.