OK let's try resetting the router..
While it is powered on, press the reset hole on the back of your router with a paper clip and hold it down for 30 seconds. Make sure it 'clicks' in when you press it, you'll hear or feel it even though the hole is very tiny. While still holding down the reset button, sharply unplug the router from power, and wait 30 seconds. Finally, plug the router back into power (all while still holding the reset button), and wait another 30 seconds.
Essentially during the whole process you're not letting go of the reset hole, it can be a little tricky so please take your time and let me know once you've done that and we'll continue with the next steps.
Now we can recreate the wireless network...
Open a web browser, such as Internet Explorer, type 192.168.1.1
into the Address bar and press Enter
on your keyboard
2. Enter admin as the username, and admin as the password
3. Click Quick Start on the left menu
4. Enter the Wireless Network Name (SSID). This is the name your router will broadcast so enter something recognisable to you.
5. Enter the Wireless Network Password. Make a note of this password, as you will need it to connect other devices to your network
6. Click Connect
When you change the wireless details on your router you will need to set up the wireless on your computer for the new details