After several hours I got it working. First try disabling all antivirus, if it lunches then add an exception to your antivirus if not.... here's EVERYTHING I did, I don't know 'which' part did the trick.(not worried about typos i wanna hurry and FINALLY play).
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Update Windows 10
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Uninstall PSO2, uninstall might be corrupt ("MS store, It just works!"). 'When' the uninstall hangs let it hang for about 10-20 minutes and reboot. If its gone continue if not try again but wait longer.
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Delete 'Mutablebackup" with this guide to reclaim HDD space, unless you don't care, then skip?? I did it tho: https://www.reddit.com/r/PSO2/comments/grim8e/troubleshooting_if_your_launcher_does_nothing_or/?utm_medium=android_app&utm_source=share
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Disable all antivirus until the very end of the remaining steps
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Reinstall PSO2 with the Microsoft Store App on your programs menu, NOT a browser.
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Launch app and wait for the really long download.
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During the download I added 'Administrators' permissions (see step 3) to the new App files located (for me) in > C:\Program Files\WindowsApps\Mutable
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Still with my antivirus off I tried launching twice, second time it started working. Then I turned 'off' silent mode on my antivirus which allowed me to an an exception for my antivirus. whew okay good luck! ^-^