Now you guys talking, I just remembered that these days I set to off of some Windows components.
I have no idea why QT5 needs something like that to run, while native Lazarus remains OK.
As far as I remember, I had deactivated the following:
- MS Print in PDF
XPS Writer
Media Resource (Win Media Player)
Internet Client Print
I did it because I was having some lag on System, and it does fix the problem.
Unfortunately, I've tried to activate it again with no results.
Nothing in this list looks like something QT needs to run.