"No internet, secured" I've done everything (A6210)

Hello! about a year ago, i bought the netgear A6210 adapter. the adapter has been doing a great job, but one day i turned on the computer and it stopped working. The globe icon appeared and it said, "no internet, secured". I've tried everything I could, restarting the pc, router, motem, reseting the network, doing the lines in the command prompt, changing the dns, and even reinstalling windows. I dont know what to do at this point. If anyone could help, it would be appreciated.