Kleuter

That's strange - the algorithm decreases window height by 10px every 10 ms, which means 1000px every second - should be pretty quick!

Unfortunately, I wasn't able to read those dump files (strange). Do glitches also happen in the Light Mode? (turn dark mode off, please). Windows version?

thanks a lot for this great research, I'll try to locate the problem and post the results later asap

Please download this test executable of the app: [UninstallTool.zip](https://github.com/crystalidea/uninstall-tool/files/11433548/UninstallTool.zip) Copy it to the app folder, start the app, **press F9**, it will produce the **UninstallTool.exe.log file**

Well, the app log says the number of GDI objects is normal (about 100) [2023-05-14 21:00:28:219] [thread 44352] [MainDialog.cpp#657] GDI objects 94 [2023-05-14 21:01:12:163] [thread 44352] [MainDialog.cpp#657] GDI objects 102

Please do right click on the UninstallTool.exe process in GDIView and select HTML Report -> Selected Items, please share the output here. Thank you

Hi, The problem is known, and it's not UT fault: https://forums.crystalidea.com/viewtopic.php?t=440&start=20#p4187

To anyone who uncounted the issue, does turning **OFF** this option helps? 

 https://www.crystalidea.com/uninstall-tool/install-tracker-installation-monitor

In case if an app (Thunderbird) updates itself automatically, you have to run its executable manually: e.g. C:\Program Files (x86)\Mozilla Thunderbird\thunderbird.exe and let it update itself. or download the updated...