Hmmm, first thing to check is whether PT 12.4 is compatible with Windows 10(I thought it was 12.5 that was the first to work with Win10). Then, I would check with Antares as it may be an Autotune issue. I would think there would be a lot of stuff on the DUC if this was an issue for others, but your post is the first I have seen describing this issue.
