A number of things could be causing this. Please read all and try the easiest fix first.
1) Your GPU drivers are fragmented in the registry path and need to be removed. In the unknown days, you had to go into the registry and dig them out individually.. . and that was a pain in the whazoo. Now you can use DDU to dig them out.
Course some people just roll back to the last known good GPU driver and everything works. Whenever you update your GPU drivers, it's wise to first remove the old driver and then install the new one. Years ago, many people just installed the new driver over the old driver and everything was fine. It may have run a little slower but things didn't crash. You can't do that anymore.
I've uninstalled using Windows 'Programs and Features' with some success but I most of the time use a third party uninstaller most of the time. Ccleaner and Revo Uninstaller, Your Uninstaller are free to for 30 days. If you use a third party uninstaller, make sure you get it from the manufacturer's site. Getting it from Cnet or anyone else usually try to throw in a lot of ads with it.
2) Go into your games and find and click 'Reset', 'Reset Game' or 'Default', 'Set to Default'. Write you game control settings down as they will be gone, too. As a courtesy to gamers, Steam games Origin games and game makers like to remember your game settings. This is a good thing. If you ever needed to repair, transfer the games, uninstall/reinstall the games you'd still have your settings. But every once in a while it would remember a 'crash' like a game setting and reprogram it back into the game. When the game reaches the criteria and circumstances to make it crash, it zonks the computer. Run Repair game, or uninstall/reinstall after.
3) Check your connections. To clean off a connection, unplug and plug it back in. Do this with ram, too.
4) Power supply is slowly failing. Do you have a spare power supply around? Not everyone does so you may need to remove and try it in another computer or switch it with a known good.
Here are a few PSU tier list.
https://linustechtips.com/main/topic/631048-psu-tier-list-updated/
http://i.imgur.com/361pNaI.png
https://techguided.com/the-best-gaming-power-supplies/
5)Windows may be corrupted. You may need to fix Windows. In File Explorer> left hand column scroll down to 'This PC"> right click Local Disk C:> in the window click 'properties'> click 'Tools' tab> in Error checking, click the 'Check' box, let it run. > Then run 'Optimize and Defragment'. The 'Cleanup' tool is under the General tab. Run that also. These tools may take a little time be patient.
Finally run the System File Checker (SFC). In the Search Box, type cmd> right click 'Command Prompt' and select Run as adminstrator> the DOS (black window) opens> on the line, C:\Windows\system 32> type, sfc/scannow> enter.
C:\Windows\system32>sfc/scannow
(if you type it wrong, DOS will tell you the correct command to type in). Let it run till finish.
Hope one of these works for you.