You can have multiple MSI Zip folders (e.g., Techstream v12 and v14). Each will share the same globally installed driver. No need to reinstall.
Open ( devmgmt.msc ). You should see two "unknown" or "failing" devices with yellow exclamation marks (often under "Other Devices"). mvci driver for toyota msi zip
Since the installer often fails on 64-bit systems, use the to extract the driver contents manually. Create a temporary folder: C:\temp . Copy your MVCI Driver for TOYOTA.msi file into this folder. Open Command Prompt as an Administrator . You can have multiple MSI Zip folders (e