netgrar nighthawk ac1900

I purchased a netgear wifi adapter NightHawk AC1900.  I was instructed not to plug in the device into the usb until the installation CD was run.  I have no external or internal cd drive for PC (only a mac, but it does not work with the PC).  So, I got a long blue ethernet cable and plugged it into the modem across the room. I clicked the download button, but I don't know if it is installed.  How do I know?  I hesitate to go any further because of the warning on the netgear hardware piece.  I always used a mac, and my office had IT people available...so I never bothered to learn how to do such tasks on the PC.  Now I am retired and up the creek.

 I contacted support and now and reaching out to the community.