Single- or Multi-Core Intel, Xeon, or i-Series processor or AMD equivalent with SSE2 technology.
If your templates are missing, go to Options > File Locations to manually point Revit to your library folders. autodesk revit 2019 installation and activation
Revit 2019, Revit LT 2019 System Requirements: Windows 7 (64-bit), 8.1, or 10 (64-bit); 4+ GB RAM (8+ GB recommended); 10+ GB free disk space; DirectX 11 capable GPU Single- or Multi-Core Intel, Xeon, or i-Series processor