thanks for your reply par_0511.
maybe you can imagine that your advice was the very first thing that came to my mind as well. The procedure didn't work, as I tried to point out, because the reason for the browser's erratic behaviour is not the wrong settings, but a browser redirect probably by the means of a hijacking code injection. I wouldn't dare to ask a question I could've figured out myself already.
Again. Doesn't it strike you as odd, that the adress "http://www.imgdownmarch.com" is part of that redirect and that directly calling it up is prompted by the error message "Requested page not found!", all the while it serves as an intermediate for that redirect? This one doesn't even exist according to any dns server I can operate my search queries to.
How about the fact, that the internet community knows for sure and for a long time already, that those redirects are probably caused by a virus or a code written somewhere into the browser's registry.
Unfortunately I'm no wizz with that part of Windows, and fiddling around with it might makes things worse if I don't know exactly what I'm doing. That is why I'm asking for your advice here. The software Malwarebytes I used to find anything malicious could only point me to it's suspicions. Nothing really out of the ordinary, and nothing really that connects to Edge Chromium or registry entries related to it.
So I'm kind of out of options. But this is a Microsoft site, right? Shouldn't you be capable to give tips and come up with tricks beyond the procedure that comes to an average user's mind first?
Thanks for your understanding. Hopefully continued?