MPC fullscreen going into windowed

[andy2004]

Hi, dont know if anyone can help, but i seem to have a problem with MPC, I open MPC and select a movie to playback, tell it to go into fullscreen, then between 15-30minutes later whilst the movie is playing if goes from fullscreen to windowed, so i change it back to fullscreen and another 15-30min it does it again.
Its only just started happening, i've used my previous acronis true image to go back and it does it on that aswell, which it didnt before, the only real difference is my monitor, on the old backup which worked perfectly before changing my monitor, where i was using a 17in CRT screen, then 2 weeks after i backed up, i bought a 22in LCD i didnt play a movie for 2 weeks, and then when i did this started happening, so far every movie i've played back, i say its a problem with MPC as it doesnt happen when using Mediaplayer 11, so as you can tell it a weird problem,
i've tried using VLC aswell, but that too has its own little problem, the taskbar comes to the front on fullscreen at around the same times.
I'd rather use MPC than Mediaplayer 11

[Baldrick]

If something happens in both VLC and MPC after 15-30 it sounds like something else starts in the background.

Have you tried disable both the screen saver and "Turn off monitor"-setting under the display->screen saver settings? And all other monitor energy settings. It shouldn't cause this problem though...

[andy2004]

screensaver is disabled.
turn off monitor is set to NEVER
as i said it doesnt happen if i use mediaplayer 11, but it does if i'm using mediaplayer classic, which is why this bug is confusing me,
I watched Mutant Chronicles using the same drivers, basically everything on the system currently, 1 difference was the monitor used. my old 17crt screen, watched the entire movie, no going from fullscreen to windowed after 18min.
about 2 weeks after that i changed from that to a 22in LCD TV connected via VGA, so i had to press F8 and select VGA mode.
Only had this 22in LCD TV for 2 weeks.
i've tried everything i can think off. i used my acronis backup created over 1 month ago, and it did it on that aswell.
going to playback the movie mutant chroincles and see if at 18-30min it does it again. that will tell me if its the movie.
ok, played back the movie, and nothing, played right through, 54min part1 as it was in 2parts. so it must be the movie thats causing it to stop at 18min, now i'm really confused.
both files use XVid codec, mutant uses 1.0.2 and the other movie uses 1.1.2final.`

FIXED, it was the movie causing it, downloaded the movie from another group.