I've had my router for about two years and had no issues but lately my internet has been sketchy and the ISP blamed my router (of course).  To investigate, I logged into the router on tplinkwifi.net and updated the firmware and also set up a couple of options to track usage.  This was last week and everything was fine.  Yesterday, I changed a few more settings to get more info and think I screwed up a setting in the DHCP section as my wifi stopped working when I rebooted and I was unable to access the router to fix it. 

As I wanted to return my router to its former state anyway, I did a reset by pressing the WPS/reset button for about 10 seconds.  This gave me back functionality and now I can access the internet by direct connect and also wirelessly by using the wifi password that originally came with the device.

The problem is I cannot access tplinkwifi.net to manage settings on my router anymore.  When I enter tplinkwifi.net, 192.168.1.1, or 192.168.0.1 I get a page that doesn't ask for username but only asks for a password.  I've entered the routers default password of 'admin' numerous times but it doesn't work.  I've also tried my old password along with my former wifi password (worth a shot).

I follow the recommended process to reboot the modem, then added the router then plugged in my laptop with wireless off but it didn't work.  I've cleared my cache, used a browser with no extensions, and cleared my DNScache but nothing seems to work.  I enter the password at the login screen and get a 'Login Failure' message every time.  It doesn't make any sense because as I understand it, the reset should have reset my password to 'admin'.

I'm really hoping I've missed something silly but I'm at my wits end.  I'm a bit worried the firmware update may have caused issues but I had no issues after upgrading/rebooting and I'm sure I used the correct version.

Does anyone have any ideas that can help me fix this issue?