Connect the computer to the router with an ethernet cable.
Also, since I was able to connect from my laptop with no problem, it led me to believe it was something wrong with my desktop.
The User name will probably be "admin" (without the quote marks) but the password can vary according to the brand of router **.
Once in to the router's setup screens, go to wireless security and review or renew the wireless security type and password.
See the literature which came with your router for how to access its user setup screens.
You'll need to note the default IP address of the router (usually in the range 192.168.0.1 though it varies by model).