While Keil µVision 3 is not officially supported on Windows 10, it can often be installed via official Keil channels

Installation Files:

Look for files named c51v805.exe (for 8051) or rvmks304.exe (for ARM), as these were common installers for the uVision 3 era. Installation Steps for Windows 10

1.2 32-bit vs. 64-bit Windows 10

While µVision 3 was originally designed for older OS versions like Windows XP, users have reported that while builds may succeed on Windows 10, the compiled code may behave differently or fail to run compared to builds from native Windows 7 environments. Official Recommendation: Arm developer resources suggest upgrading to the latest

To download Keil uVision 3 for Windows 10, follow these steps:

Where to Download:

Because the official archives are difficult to navigate for this specific version, most users acquire the installer through one of two methods:

For 100% reliable uVision 3 experience on Windows 10: