TD Playback - Stuttering

Hi There,

Running TD on my MBPr for a little under a year now and it has been running smoothly. Updated video drivers and Windows 7 recently and now playback on even the demo project is stuttering terribly, to the point where the entire interface freezes periodically every 2 seconds. Frames are being dropped. Is this a known issue, should I roll back my windows drivers, my graphics drivers, or both?

Have reinstalled TD several times, rolled back to a previous version, having the same problem.

TD is basically unusable at this point for me. Any suggestions how to get it working again?

Could try undoing what you did 1 step at a time, testing in between each step to see what the issue was.

ok may have figured out the issue. program and software currently running fine on my built in laptop display. when i turn off built in display and switch to external display via thunderbolt, program and framerate stutters and is basically unusable. Any idea why this is happening?