After installing Windows 10, I had this error for quite some time. I managed to figured it out. It has something to do with Administrative permissions on your Drive (for example: you cant record directly on the Local disc C: D: E: etc.), you have to record in a folder. I hope that I helped to people that have this error. I didn't see a solution on the forum so I decide to post my findings.
Thanks for this. I found that by changing where the program wanted to store videos and the temp directory, it would fix the error 12 problem. Much appreciated.
tried it but still didnt work
Error 12 specifically has to do with the Temp video directory. Make sure you try changing that one.