Yep, that was the issue. Avast was in silent mode, and thus didn't show the pop-up message saying it blocked the installer. I don't really know why Avast considered the "serv" folder a "protected folder", because I just really created a new empty folder.
(And on the topic of running multiple AV softwares, Windows Defender delegates the job to any other AV it detects, so I think I'm fine. Besides I don't think it's possible to entirely disable Windows Defender as it is part of Windows 10) But this is off-topic on this forum 😁
Anyways, thank you for the help