It is highly recommended to install to C:\Keil rather than C:\Program Files (x86) . Older software often struggles with the spaces in folder names and the strict permissions of the Program Files directory. Troubleshooting Common Windows 10 Issues
uVision 3 is primarily used for 8051, 251, and older ARM7/ARM9 microcontrollers.
If you are using a specific development board (like an older Nuvoton or ST board), the manufacturer often provides the specific version of uVision 3 required for their hardware in their "Resources" or "Legacy" section.
To avoid common crashes during the setup process, follow these steps:
Visit the official Keil website and navigate to the "Download" section. Look for the "Product Archive" link. You will typically need to enter a valid License ID to access older builds.
This guide covers everything you need to know about finding, installing, and optimizing Keil uVision 3 for a Windows 10 environment. Understanding Keil uVision 3 Compatibility
However, if you are maintaining a certified legacy system where the compiler version must remain identical to the original build, uVision 3 remains your best option. If you'd like, I can help you find: