Since many of these drivers are community-supported or provided by hardware manufacturers, you can find them for free on:

The Ultimate Guide to MVCI Drivers: Multi-Version Support for x32/x64 OS

Historically, MVCI drivers were designed for 32-bit (x32) Windows XP or Windows 7. However, most modern laptops run 64-bit (x64) Windows 10 or 11.

Often, the "XHorse" or "Mini-VCI" driver packages come bundled with the diagnostic software. Step-by-Step Installation Guide 1. Pre-Installation

Run the .reg file included in your "multi-version" pack. This tells Windows where to look for the driver interface.

Move the .dll files (usually MVCI32.dll ) to the program folder of your diagnostic software (e.g., C:\Program Files (x86)\Toyota Diagnostics\Techstream\bin ).