I have been making posts about Fast! software which I have been really impressed with having installed it 48 hours ago it has so far returned a big dividend in speeding up my PC system and has improved the performance of Pro-Tools on my system, including eliminating the infamous -9173 error.
I have made some short videos (no sound track) that shows the System Resources Meter in Pro-Tools and it's reactions during playback of a large Pro-Tools project that I am currently working on.
Since installing Fast!
http://veryfast.io
I have experienced ZERO crashes/lock-ups/shutdown errors, as well as experiencing an appreciable difference in speed and stability of my i7 - 6700 CPU @ 3.4GHz 32 GB RAM PC system and have no qualms in recommending Fast! as a valuable asset to stabilise recording sessions, the result being faster workflow and increased productivity, all adding up to an enhanced user experience I think.
Video 1 shows Pro-Tools 12 with a large project running with FAST! activated (running in the background), the System meter is open all through the clip and there are shots of the various CPU intensive plug-ins working without the slightest hint of any over-taxing or red line spikes:
https://youtu.be/OVkHs-qfkCY