UEFI "Secure Boot" feature from BIOS is preventing Aero Glass DLL from initializing properly. You may have disabled Secure Boot, which has solved your issue Please report the notifications popups to Bigmuscle, and provide your version number of the specified files Yes, it was enabled before, you're right. And yes, I used version 0.85 beta by mistake. Will try 0.8... ...and yes, the errors are gone. But the artefacts are still there. Unfortunately, I can't screenshot them as they go away during making the screenshot.