Arduino was working fine with the Win 10-Win 11 update, but after the LAST update yesterday, and a reboot, Arduino will not run. Ran the debug.exe and after doing some checks says, "starting". Well it never does. The ico appears on my task bar, but won't open and won't show any file. I de-installed Arduino and re-installed: same thing.
Ideas?
All I can tell you - I upgraded yesterday to 11 with no issues. Arduino 1.8.16 is installed. You've piqued my interest, I will check for updates and bravely install them. 
Do you mean arduino_debug.exe?
Please post the full and exact text of all output.
I just ran the complete update KB5006746 and Arduino IDE launches perfectly.
Hi all, thanks for responding. I did more stuff and it is now working.
bob found
Nov 3, 2021, 15:41 GMT+1
It is now running and I don't think it had anything to do with Java or
Win11 issue.
When I hovered over the icon in my task bar, it would indicate the file
it thought was loaded, one that I created last week. But the popup
little window didn't show the file, only white space and when I clicked
on it, nothing happened, ie the page didn't open. I was curious about
this because I re-installed Arduino about 5 times and yet this file kept
showing up in the header. So I removed that file from the sketch
directory (it was in separate space from the executables which were in
program files) and restarted the app. And it worked. I can't see a
problem with my file (the one that I moved) because I had been editing
it quite a bit. Maybe I saved it with a control character in the
filename...or something. I don't know.
anyhoo...it's working now and I reloaded the file I thought may be in error, with no issues. One thing: I was using an app to keep one file constantly in front of the other. Maybe this put some funny characters inside the file.
I'm glad to hear it's working now. Thanks for taking the time to post an update.
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