Laptop crashes playing two games

The computer continues to have BSOD with bugcheck WHEA 124.

Consider contacting Lenovo or a local computer store for servicing.

I agree with @zbook, you've done all you can software-wise and yet the BSODs still happen and all for a PCIe issue. This is clearly a hardware problem and I suspect, given what I found in some earlier dumps, that it's a motherboard issue. The other possibility is a graphics card issue - but on balance I rather feel that the motherboard is more likely.

As a final check, be certain that you are running the latest BIOS version and that ALL drivers are updated - and not via a crappy third-party driver install tool either, get the drivers from the motherboard vendor's website, the Nvidia website, etc.