@mrjj said in Win toast / balloon notifications stopped working recently on windows 10 with Qt:

Hi
tried your code (Qt 5.12.6) in winVer1803 which is rather old now.
I didnt update to 1903 as had many issues at work with it.

No toast was shown using your code. ( I did assign valid icon)

So in what version did you actually see that code work ?

I saw the code work on Windows 10 Enterprise winVer1803 in August. Now still on winVer1803 (with hotfixes KB4512576, KB4516115, KB4521861, KB4523203, KB4525237 installed in the meantime) it's not working as I said. But recently I tested the code on Windows 10 winVer1903, and it worked on Qt 5.7 and Qt 5.12, the test notification was showing up! It doesn't make any sense to me. I might have to try using the new Windows 10 api to post the notifications, which is ugly or maybe impossible with using Visual Studio 2015.