"Pop-up video games" usually means one of three things. Match your situation:
Symptoms: "Play Now!" buttons, fake "You Won!" screens, redirects to app stores.
Symptoms: Games you didn't install appear in Start Menu, launch at boot, show notifications.
Run Malwarebytes + HitmanPro (free second-opinion scanner). Check Task Scheduler for rogue tasks. Reinstall browser profile.
Describe your exact pop-up (screenshot helps) for a targeted fix.