IN GAME FREEZING
**Update: 2018-08-05: The Workaround proposed by FrankieAndMe (see below; it's about stopping Nahimic.service) works admirably for me! Thank you very much, FrankieAndMe! This is awesome! [garen-swing] ** Note: It was only by FrankieAndMe's post that I became aware that there is such a service as Nahimic. I suppose it's pre-installed on all Alienware devices, as an improvement to Audio. Right now, however, it looks like Nahimic and LoL don't interact correctly. Don't know where the root cause is, but hopefully somebody will fix it...
Original post: When I play LoL, then after about 5 minutes, game starts freezing, multiple times, at increasing length, till the game is practically unusable. This happens in all LoL game sessions, independent of the intensity of action. Audio can be heard, the last sound effect being drawn to great length (still can recognize the kind of sound). Friends on Discord can be heard without issues. Before the first freeze, and in between freezes, gameplay is unaffected, with over 100 fps. During freezes, mouse can still be moved. When game is frozen, I can't reliably tab out of LoL. Even if I manage to tab out of LoL, then if I tab back in, I get a black screen and can't even call up Windows Task Manager with ctrl-alt-del any more. In that situation, the only remedy is a long press of the power button to forcibly shut down the computer.
Other games, like Fortnite at Epic settings, can be played without any issues. The freezes are particular to LoL only.
Uninstalling and re-installing LoL (multiple times) didn't help. Hextech repair didn't help. Installing the latest NVIDIA driver didn't help. Nothing helps, it's totally frustrating.
Got a brand new Alienware 15 R4, i7-8750H, NVIDIA Geforce GTX 1070, running on Windows 10 (all updates having been run by Windows Update).
Please help sorting this out. As I can see, other players are having the exact same kind of problem. This bug kills all the joy of playing LoL.