Hi Tom and Sailor.
Thing like this happened to me, not often but I can recall few times when this happened. I don't think it's something connected with Corona nor Wacom tablet. If Max or any other program freezes, it's mostly a heavy workload of a hardware which just causes to not get any info from the software anymore. Keyword is freezes, it does not crash but freezes.
If you go to Photoshop and then come back to Max and see it frozen, that kinda hints to GPU (I remember sometimes stress tests or games freezing, not crashing).
I cannot recall nor cue to some specific troubleshooting for this, as it may vary from scratch disk parameters to windows update but here are some general steps I would suggest to further understand what causes the freeze and how to get rid of it.
1. In any case, please try to fully update Windows, and then update the graphics card driver. If Nvidia, try using the Studio Driver.
2. Try rendering a very small and simple scene in Max (15sec to 2 minutes). Save the rendered image, see if Max frozen. If not, try opening other software, like Photoshop, play around and then get back to Max, see if it is frozen.
3. Try getting info from Task Manager about Max's process, attach it so we can get better info. The CPU, Memory, Even disk drive and GPU load preferably.
4. Do you use any kind of overclocking, XMP, core boost etc.? If so, turn off the XMP, it is known to cause freezes, which then lead to a crash.
5. Fun thing. When frozen, try opening Task Manager and double clicking on the frozen process. Few times that got the app back for me, try it, why not :)
6. Do the freezes happen only with Max or other applications as well? Try stress testing your PC and see if it leads to freezes.
7. Try using another version of Max. If freezes still happen, then its probably something hardware connected.
Give us also the full specifications of your PC, as detailed as possible.
This seems a general freeze, not something Corona related. And so you better make sure you troubleshoot it in whole, from PC configurations to updates and hardware.
Cheers and happy troubleshooting!