[Stuart Soled]

I have exactly the same message and intrested in the answer as well

[Stuart Soled]

I had a similar problem on upgrading from windows 8.1 to 10. what it turned out to be was not a sony vegas problem but an nvidia problem. I found out that when i used my amd radeon r7 260 card , which is a few years old, things worked fine and better than ever. however when i used a newer nvidia card with their drivers. (msi geforece gtx 950 (and i have an msi motherboard and no problem with anything else) it would continually crash during rendering no matter what i did. i went back to the radeon card and now i can render multiple files at once and i have not had a single problem. i certainly do not have good feelings about nvidia at this moment as it took some time to piece this apart and get my vegas pro working again like it used to.