When it all started, I had gotten my computer back from the guy who fixes our computers, and I had never had this problem before ... he upgraded my computer to Windows XP, and got rid of spyware on my computer and updated everything (as well as put some more memory on it).
When I went to play a video file in windows media player (I had just downloaded 10), it wouldn't play it right. Either the video screen would become this dark purple color, or it would have a pixilated version of one of the top corners of the video that was trying to play ... eventually, after searching online for a while, I found a website that helped me explain the problem. It was something about having to go into the options, then the performance tab, and going to the advanced properties, and changing the rendering settings. After that, it played the video files perfectly.
Now, today I was playing an .AVI file on my windows media player, and it wasn't making any sound ... so I downloaded a codec pack, and tried to play it again ... and it acted like I had just re-installed WMP 10, and re-set all of my options to the default, including what I had done to the rendering ... so of course, it went back to make the wierd purple screen, or doing that strange pixilated thing ... for the past five hours i've been trying to remember what exactly I did, but i've searched for a while now online and i've not been able to find anything that's helped ... I've been messing with the settings (Tools, then options, then performance, then advanced), and it's still not working ... and i'm really wanting to play this video file @.@;
(By the way, even though in WMP it worked after the first time I had fixed it, it still did the same thing in Real Player and in Windows Movie Maker)
If someone can help me, i'd really, really, really appreciate it ...