I know PSO2 has a lot of install problems with the Windows 10 store version - which isn't just the Windows Store problems, but also the fact that it has a super janky way of handling itself on its own, which just compound the two problems. I had nearly a dozen phantom partial installations of the game on my SSD at one point. Thankfully, the Tweaker team seems to have pretty well figured out how to fix all of this and automated the process, including safeguarding it from messing itself up again.