Hi, I was using Vegas 8c on Win 7 64bit and noticed there was an 8.1 release to make things more speedy. Installed great and it truly is faster BUT Vegas and Win 7 freezes when I click the "video" tab for a custom render. Sometimes it unfreezes after a couple of minutes and sometimes I have to use Task Manager to close it down. TIA for any suggestions on how to fix this.

Brian