Running JV16 PWT 2017's (ver. 4.1.0.1657) clean and speed up computer tool's Fix function clobbers Corel 's WP Office X7 suite.
Procedure: Run program & have the tool analyze the Registry, to fix.
Results: Even at safe level, and then have it fix errors, WordPerfect in the Corel X7 suite misbehaves afterward. Word Perfect reports that the suite was installed incorrectly, won't do screen I/O, and has to be killed. Even restoring the backup I made before OKing the fix doesn't restore the suite's functionality. I have to revert using a system restore point.
It may be that X7 has a bunch of Registry settings that are empty, only their PRESENCE is necessary, and JV16 sees the empty values, and deletes them. At any rate, I'd suggest installing the suite, use it for some trivial work, then run JV16 and fix the Registry to see if you can replicate this behavior.
I'm a technically adept user, so you can ask me for anything in troubleshooting this to fix it. I'm running Win 10 Pro x64 1067 build 14393.693 fully up to date with 4GM RAM.