Can't access router (192.168.0.1) (Unknown password)

On every router, there's a tiny hole with a button inside. Get a needle or something similar and press that button. Your router's settings, username and password will be set back to default (username: admin | password: admin).

The default username and password for most of the routers is:

Username: admin
Password: admin

If you can't seem to find the password for your router, try calling your internet service provider. If you don't know who your ISP is, do the speed test, it will tell you what's your ISP and then you can use Google to find their phone number.

Sometimes, the password for accessing the router are placed on the box your router was packed in. If you saved the box, check if it has anything useful on it.