USB connected MiFi 500 drivers won’t install

:confused: I am trying to setup my MiFi 500 on my Windows 7 - 64 bit professional desktop. I have a cradle amplifier and a 12 inch antenna outside and use USB tethering. The MiFi 500 shows a 5 bar signal. It showed activating and updating, but the home page won’t open. Also the drivers tried to install but did’nt work. When trying to install the MiFi 500 drivers again, a box comes up saying “USB device not recognized”
I could’nt find the drivers in device manager or regular programs, but they were in “Program Files (x86). I used “unlocker” to delete the Novatel Wireless files. When turning on the device again to install the drivers, there is no error message, nothing.
How do I get the drivers to install?
restorama