I'm currently in discussion with support about the dreaded 65536 error when trying to save a video.
Basically I have a new PC and bought another unlimited license for using the video editor software and now when I try to save a video in any format it fails after only a couple of minutes with a 65536 error.
When I change the encoding setting to single core instead of multithreaded - it works! But it takes longer to encode the video and the playback quality is noticeably worse with slow down in the video output.
I have just built this new PC with a fresh install of Windows 7 64bit and have tried the uninstall and clean procedure which AVS send out as a standard reply.
On my old PC it is working fine with the same video albeit a slightly older version of the video editor software for which I do not have the install file anymore.
Also on my old PC, I came to use it one day and got the 65536 error when trying to save a video so I rolled back to a previous image I had taken of the PC two months ago and then tried the same video and it sailed through so I am wondering if it is some kind of Windows update which is causing this which is why not everyone is experiencing it.