ArcGIS Pro requires a 64-bit operatingsystem (OS). It will not run on a 32-bit OS. ArcGIS Pro currently supports the following operating systems:
- Windows 10 Home, Pro, and Enterprise
- Windows 8.1 Pro and Enterprise
- Windows Server 2019 Standard and Datacenter
- Windows Server 2016 Standard and Datacenter
- Windows Server 2012 R2 Standard and Datacenter
- Windows Server 2012 Standard and Datacenter
Esri dropped support for Windows 7 and Server 2008 R2 after January 2020. They made this move because Microsoft ended their support for those operating systems. This means it might still be possible to run ArcGIS Pro on these operating systems, but neither Esri nor Microsoft will provide you with support if you encounter any problems. It also means that neither company will be providing patches or updates to fix security vulnerabilities or bugs in either of those operating systems...