Internet connection issue

[macieqq]

Hey. I came back from work yesterday and powered my pc right away. I noticed my connection was down and when i opened chrome I got redirected to some sort of a page with a huge TP-LINK logo and some info that my firmware is out of date (3.7.0) and it is crucial to upgrade it. There are some links below to .exe files (Windows /Unix/MacOS). Whenever I try to visit any other page I get redirected back to this TP-LINK thing or I get a message about having no internet connection. I've tried restarting my router but it didn't work. Then i've downloaded and upgraded my routers firmware through smartphone (to 3.14.3). The weird thing is that my firmware was 3.13 (TL-WDR4300) and not 3.7.0 as it was mentioned in that message. What is more my G Data keeps closing chrome cause it detects fingerprint. Also task manager won't open for some reason. I never click some fishy links and everything was fine before I went to work. What could have happened and how do I fix it? Please help me, cheers!

I've attached a photo of this issue. Sorry for the bad quality and the fact it's in polish but you can get the overall idea how it looks like.