I view my videos with WMP9...when I watch videos off the internet...they're fine. When I watch .avi files I captured with Vegas (despite how large they are), they play back fine. However, when I try to play videos I rendered with Vegas, they take forever to load and usually cause my system to lock up. This happens always with .avi files as well as .mpeg2 and .wmv. I've looked through the posts but can't find any help for this. Are there codecs I need to download? I use the MainConcept 2 default settings and the WMP9 default settings for 1MBPS.