does your radeon card contain a video out, either an s-video or rca plug? if this is the case, and you DO have a tv connected at the same time, your computer may treat this as mulitple monitors. if your monitor is set to 800x600 you will not notice this being the case. however, if your monitor is set to a higher resolution, it will boot to 800x600 anyway. a tell-tale sign. to fix this problem, try downloading the newest drivers from
they update their drivers often. you will have to uninstall your old vid driver first before you install the new one.
once installed, go to your display properties, go to settings, an click the advanced button. this will bring up the driver specific properties. from there click on the display button (i think). the display tab will allow you to change the tv and monitor settings.
as far as your video freezing your computer, perhaps a different video player will work. It sounds as though your "two monitors" have no bearing on this.
let me just say i don't like using windows media player (wmp) to play any of my video files. it is much too big a program and eats resources. i am partial to a very small media player called sasami 2000. it is free and on
i would next try getting the newest codecs for video playing. the latest divx codec is free and on
there is also a file floating around the net called "nimo codec pack 5.exe" (a self-extracting zip). This codec pack contains every imaginable codec you would or could ever need for playing and manipulating video and audio.
hope this helps, and please let me know if something i've suggested is wrong, so i can learn too!