After using the font, the IDE is ripe for reinstallation SOLVED!

[mdijkens]

Man, you saved my nerves! Thank you so much. I never thought of that possibility (I was just wondering how the hell a font could do something like that). 
Thanks for the help, removing the folders from that Windows parody of antivirus helped. 

The problem has been mentioned here several times, including by me. These problems actually only occur when you use the so-called home directory under C:\\ in Windows.

Divide your HD into C:\\ and D:\\ and install executable programs such as QB64pe and the created QB programs under D:\\, and there are no more problems, not even with Windows Defender. At least I have never had any in this regard.

That's what I've always done; qb64pe lives here at D:\utils\qbpe64 from the start.
I think this time microsoft update decided to include it for some reason