I have recently bought DELL Optiples 390 mini tower. Core i7 2600, 4GB RAM, GTX 1050ti 4GB using Win 7 64bit. Bcz in Windows 10 card driver does not install says driver is not compatible to this version of windows so i switched to win 7. During playing any game, my PC freezes at any spot and then nothing happens, cant open task mgr nothing complete freeze. Then I shut down my PC by pressing power button. What should I do?