Adjusting the performance will not help, keep the default 70% but never 100%.
The registry setting (nothing like a "hack", only an important piece of information) is the only way. There are a number of ways to edit the registry in a wrong way, it must be done exactly, without any additional space for instance. A very common error is to select the wrong PSE version (PSE2018 is version 16). There is a risk with the Windows store version. Even if creating the default categories, there has been an example in this forum where the issue was not solved.
If you can provide screenshots of your registry edits, maybe we could check if something is wrong.