I have a Dell Optiplex 400mhz that I bought from my employer and want to install a USRobitics 56K winmodem. I have tried everything I know to get this thing to work. It was on a network so I checked ...

So, I wanted to add an Inseego USB800 4G dongle to my PC. I got a used one for a great price. It appears to work, but I can't install some of the drivers. The "foolproof" automatic driver install ...