I found that every time I opened a folder or drive that had AVI (Divx/Xvid) files the screen would freeze with a jitter, crashing the system. Only by unticking the folder option: Tools/Folder options/View - "show pop up descriptions...." the problem was solved. I miss this option as I find it very useful. I tried uninstalling and reinstalling the Divx and Xvid drivers and no change. Any clues?? System is ASUS P5RD1-V with 1GB ram running winXP SP3 and up to date updates.