On desktop machines, Windows 11 has been running without any issues. Since upgrading 22H2 last week, I've seen some strange permission difficulties, although not across the board. I utilise Photomatix Pro 6 to edit RAW files. When it tries to save the modified file, I get the error message Unauthorized alterations banned (after converting from RAW to JPG). power over the banned folder. The same thing happens when I try to download and save a photo from Facebook. I don't experience the same issue with Canon Digital Photo Professional 4. Before the 22H2 release, I had no issues running these programmes or saving files. Can anyone help?