To run Cyberpunk 2077 you need a 64-bit Windows 10. Note, Windows 7, 8 and 8.1 are not supported.
How to check if your PC is running the 32-bit or 64-bit version of Windows?
1. Click Start button.
2. Choose and click Setting from the Start Menu.
3. Go to System -> About.
4. In the About tab, find your System type, which lists your operating system and CPU type.