Hello, I'm not sure about the right board. And I have read hundreds of posts before, but did not find a solution. I have dropbox since years. It ran fine. In March I changed from Win10 to Win11. It still ran fine. We use a dropbox to coordinate music activities within a band. I am the leader, the owner of our box. Somewhen in May the dropbox icon disappeared in the task bar. And it didn't synchronize anymore. The only solution I found so far, is to install again and again dropbox.exe new. After installation all works fine the files are updated, my co-workers see all, I receive new files. So, the dropbox itself works. And it does as long as the laptop is switched on. After any new start the icon in the task bar disappears, pressing the desk top icon onlyopens the (unchanged) files on my computer. No connection to the online dropbox. When I (re)installed dropbox again in the last week in August, it surprisingly worked for 3 or 4 new starts of the laptop. But now it's gone again. I have no idea, how to solve this strange problem, which may have to do with the May Update of Win11. But this is only a nebulous idea. By the way, the other have no problems, when I can upload new files. One co-worker has similar problems. Has anybody an idea, what I can do. Thanks Joe.