Windows Explorer (that's the app you are opening that folder with) tries to build thumbnails and the "CODECS" are often buggy. This results in the issue you are seeing and sadly, I've yet to hear of Microsoft addressing this issue.
A quick workaround is to change the view to Details and to turn off thumbnail display.
Bob
I am really confused. After I open "My Videos" folder my RAM will slowly increase until it reaches 100%. It will remain maxed out for about 20 seconds and suddenly return to normal. My computer runs idle using about 20% of my RAM. I have 6 GB which has been plenty for what I use my PC for. I have tried using the task manager (resource monitor) to find what is causing the increase in RAM usage, but there are none using that kind of RAM. How can I track what is causing this, or has anyone heard of something like this happening? Any help would be appreciated. Thanks.
Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic