So, I play a few DX11 titles on my machine, notably Sniper Elite 4 (yes, it's DX12, but my video card doesn't support DX12), Sniper Ghost Warrior 3, Fallout 4, and Skyrim. I also play some non-DX11 titles, like Star Trek Online, Kerbal Space Program, and some other older MMO's, and Sims 3. Last Monday, I played SE4, no problems, and after playing for a few hours, I quit, installed Sims 3, and went to bed. Tuesday, I went to play SE4, and I got the 'sniperelite4_dx11.exe has stopped working' on game start, after I clicked play on the pre-game launcher menu, and before the game itself loaded. I also got this in SGW3. And Fallout 4, and Skyrim. I goggled this issue a few times, and the ONLY thing I could find was a note on a website about a January 2017 driver causing this. I'm not using a Jan '17 driver, I'm using a July driver. The ONLY advice I could find was to go with different drivers. So, I downloaded and installed the September stable WHQL drivers. Even with the new drivers, I still couldn't get any DX11 titles to launch. I ran the DX9.0c redistribute package, since it can 'fix' DX problems, and when I rebooted, I started MSI Afterburner, and nope. No games would run in DX11. So, I killed MSI afterburner and RTSS, and to my shock, every game runs just fine. I tried MSI Afterburner without RTSS, and nothing ran. I tried RTSS without MSI Afterburner, and everything is fine. I reinstalled both MSI Afterburner and RTSS, and still nothing will run with MSI Afterburner running. I can reboot, start a game, quit the game, start MSI Afterburner and RTSS, and nothing runs, quit MSI Afterburner, and everything runs fine. Goggling this is totally useless, as either threads are from before the age of man, or about games crashing after running a while with MSI Afterburner running What irks me the most is that this only started happening after installing Sims 3. This is the same copy of MSI Afterburner I've had for months. So confused... Any suggestions on fixing this? Oh, I guess I should note. My older, non DX11 games run fine with MSI Afterburner running. System specs: i5 4440 (stock) 32GB DDR3 (stock clocks) EVGA 980 refrence board with stock upgraded cooler, no OC Windows 8.1 Pro on an SSD Games on an SSD RAID 0 CPU runs between 40-60c on the stock cooler. I run a custom fan curve for the 980, my temps generally never get over 62c, even in FurMark, unless it's really hot in the house to begin with, so I am positive this is not an overheating issue.