I had a quick go at it yesterday (the latest 535 broke DDC CI for one of my monitors, making plasma-powerdevil unable to start) and for whatever reason KWin ran at something like 3 seconds per frame. No that’s not a typo, I mean it. I hope it’s fixed before it gets to Arch’s repo.
EDIT: It works! I had to switch to the DKMS driver (the main one isn’t in the repos yet) but other than that my Wayland session didn’t die a horrible death. Well smooth. I still didn’t test much, but at least night light works.
If it’s just the dirty flag (it was uncleanly unmounted) you can try
ntfsfix -d /dev/sdc1
Still probably better to boot into Windows and let it deal with it (ntfs tools are still reverse engineered stuff after all), and check journalctl before doing it, but it works in a pinch.