Hi SnowS, Don't know if this will help but I had the same problem with WinXP Home Edition and here's what fixed it. I went to the following folder: Documents and Settings (Name of user you're currently logged into) Local Settings Temp ...and then deleted all of my temporary files. Then I rebooted and everything worked fine again. I make tons and tons of renders and have had to do this twice in about 4 months time. I think that the temp files build up after awhile and you have to clear them out (or some such thing). Not sure if that will help, but give it a shot :-) Good luck. Matt