Answer recommended by moderator
Update. One of the minidumps showed that at the time of another BSOD, my CPU's frequency was 2995 MHz. At that point I thought maybe it's Armory Crate, an app which came with my ASUS laptop that allows you to switch overclocking profiles, it was behaving weird, sometimes not switching profiles (for example, from Silent gaming mode to Performance etc), sometimes fans weren't spinning, so I thought perhaps CPU is getting unstable due to weird frequency jumps and so on, and I was right. After doing ASUS cloud restore, which also did clean Windows install, I immediately uninstalled Armory Crate and so far, 4 days later, system is stable again. Browser isn't crashing, high and low demanding tasks, no BSOD's. Either that, or perhaps it was some nasty driver conflict. Anyway for anybody finding this topic, I suggest doing cloud restore and getting rid of Armory Crate, because I was on the edge of replacing mobo and CPU and thank god it wasn't the case.
