I've worked as a sysadmin, developer, tester and integrator; and I find this software difficult to install; mainly because of what is missing; For example, a cable must be connected between your vehicle and the computer before you can install the required device driver. My Windows 10 antivirus software deleted some files when I copied them to the system. After disabling antivirus and watching the video that came with the driver, it took me a few installs before I got it right; mainly because you have to pay close attention to what exactly the video is showing you; B. Running the program as an administrator user, accurate software registrations and launching the program from the provided shortcut icon. I ended up installing the software and programming the turn signal and door lock settings on my 2021 Prius. For my daughter's 2012 Prius I programmed a new FOB as well as some door lock settings. I found, downloaded and installed Techstream_V16.00.020. I think it's worth the time and frustration to avoid the exorbitant prices Toyota charges for this job-only service. . There are 4 Toyota cars in my family and I will change them all.
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