For those of you running XP who have machines that refuse to load the correct USB drivers here is what you can do:

Plug the MPVI interface in, go to the control panel, device drivers, expand the USB section.

1) If FTDI A,B are seen and not HP Tuners MPVI Channel A, B, right click on FTDI A and uninstall. Do the same for FTDI B.
2) Unplug the MPVI.
3) Unzip the USB driver files (if you downloaded them).
4) Plug the MPVI back in.
5) This time when Windows finds a new device, manually select the drivers in in the unzipped folder or CD.

If Windows refuses to load the correct drivers, repeat step 1 but this time do not unplug the MPVI.. Right click on whatever drivers Windows installed for the MPVI and select "Update Driver". Now point Windows to the folder where the drivers are.

When all is said and done, the USB device MUST report "HP Tuners MPVI Channel A" and "HP Tuners MPVI Channel B". If not the drivers have not loaded properly.

Windows 7, 8 , 10 Vista & XP 64 bit operating systems driver install instructions for those with internet and windows automatic updates turned on
1) Connect your interface
2) Done. Windows does everything

Windows 7, 8 , 10 Vista & XP 64 bit operating systems driver install instructions for those with internet but windows automatic updates turned off
1) Connect your MPVI interface to your laptop
2) At this point the driver install will likely fail(it did for me)
3) Open the control panel and in the search window enter device drivers
6) Under Device manager select the update device drivers one
7) There will likely be two MPVI devices with an ! listed next to them in the 'other devices' section
8) Right click on the first one, click update driver software
9) A window will come up, tell it to browse the internet for the drivers
10) it will now install properly
11) repeat for the second one and you're done!

Windows 7, 8 , 10 Vista & XP 64 bit operating systems driver install instructions for those without internet
1) Download the drivers here https://www.hptuners.com/downloads/
2) Unzip the drivers to your desktop
3) Connect your MPVI interface to your laptop
4) At this point the driver install will likely fail(it did for me)
5) Open the control panel and in the search window enter device drivers
6) Under Device manager select the update device drivers one
7) There will likely be two MPVI devices with an ! listed next to them in the 'other devices' section
8) Right click on the first one, click update driver software
9) A window will come up, tell it to browse my computer for driver software-from there find your desktop
10) it will now install properly
11) repeat for the second one and you're done!

Not hard just different from previous operating systems.

Here is the demo  http://files.hptuners.com/support/De...Win7Driver.swf