Select or Windows 7 from the drop-down menu.

Even some legitimate-looking download aggregators host unverified installers. While sites like "zuixu" or "freedownloadmanager" claim their downloads are virus-free, they cannot guarantee the integrity of a nearly 20-year-old piece of software like the original uVision 3 (dated 2007). The safest approach is to avoid these altogether.

Since Keil uVision 3 is a legacy product, it is no longer featured on the main Keil homepage. To find the installer: