The laptop model is IdeaPad 3 15IIL05. Long ago I have installed 4gb ram stick to already soldered 4gb and it worked fine for 2 years. However, recently I tried changing the 4gb ramstick with 16gb stick. It booted, showed the 20gb total memory and worked fine for 2 hours. However, after it I got BSOD "driver overran stack buffer". Now when I try to boot the pc with old and new ram stick it won't boot at all, only if I remove any ram stick from the free slot, only then it boots. How to fix that?