I just did the update to the latest Vegas Pro 18 and right off the get go I get freezing on rendering the simplest of edits. Any solution to what is a very annoying problem? Never had trouble with this on any Vegas program since Vegas 11.
You are not a new Forum-user.
Have you already gone through point 16 of this tutorial?
https://www.vegascreativesoftware.info/us/forum/vegas-pro-faqs-and-troubleshooting-guides--104787/
Are you on the last build (434)?
The graphics card driver updated with the function "Help / Search for driver updates"?
Searched the forum for your topic?
There have been several solutions to this issue recently.
If none of this helps - start here at B and C:
https://www.vegascreativesoftware.info/de/forum/important-information-required-to-help-you--110457/