Windows 11 updated and re-enabled driver signing. Fix: Reboot and disable driver signature enforcement again (see Part 3). Then, in Device Manager, uninstall the MVCI driver and reinstall the legacy version.
Open (right-click the Start button and select Device Manager).
You can buy a subscription on the Toyota TIS website.
: 4 GB minimum, though 8 GB is highly recommended. Storage Space : 2 GB of free solid-state drive (SSD) space. Step 1: Downloading Toyota Techstream and Drivers toyota techstream download windows 11
Open Techstream. Go to Setup -> VIM Select . Choose the appropriate drivers (usually "XHorse Firmware" or similar depending on your cable). Click "Connect to Vehicle." If your COM port is set correctly (usually COM3, COM4, or COM9), it should handshake with the car.
If you are using a standard , the default 32-bit driver installer will fail on Windows 11. You must manually copy the driver files.
Some third-party registration fixes or older driver utilities trigger false positives in security software. Create an exclusion folder on your main drive (e.g., C:\Techstream ) and add this folder path to your Windows Defender exclusion list before downloading files into it. Step 3: Installing Techstream on Windows 11 Windows 11 updated and re-enabled driver signing
Windows 11 (64-bit Home, Pro, or Enterprise). Processor: Intel Core i3 or AMD Ryzen 3 (or higher). Memory: Minimum 4 GB RAM (8 GB recommended).
What (Mini VCI, Mongoose, OpenPort) do you plan to use? What year and model is your Toyota or Lexus vehicle? Share public link
Connect your Mini VCI or alternative J2534 cable directly to a USB port on your PC. Open (right-click the Start button and select Device
With a valid TIS subscription, Techstream can also perform —something no generic OBD2 scanner can replicate. It's the same software used daily by dealership technicians to service vehicles from 1996 onwards.
Once the software and hardware are configured, establish a connection with the vehicle's Engine Control Unit (ECU).
If you're using a loader or patch:
Select , go to the Compatibility tab, check Run this program in compatibility mode for , and select Windows 7 . Check the box for Run this program as an administrator .