I have encoded avi files to vcd or dvd format for some time successfuly on this pc with little or no problem. This past week or so though everytime i try encoding a movie using numerus different encoders and even different movies....The process starts off fine then 5-10 minutes into the encoding operation the pc with no warning (no blue screen...nothing) just shuts down. This morning i was using virtualdub to add subtitles to a film and used frame server to encode with TMPGenc 2.5 The task went well for ten minutes and then the pc just closed down. Yesterday i was using Covertxtodvd to convert an divx avi file to dvd and the same thing happened. I have enough room on my hardrive so no problem there, and as i say my machine's cpu has coped well enough in the past with the task....anyone any idea what is happening here. Any thoughts appreciated as i am well and truly stumped.