Inspiron 7537 WiFi / LAN Page loading issue

Hello everyone, im new here. I have a problem with my new laptop i have recently bought. Dell Inspiron 7537 15inch OS 8.1 (after upgrade from 8.0) 16gb RAM, Samsung SSD SM 841 256gb. Lets go to the point - When i try to load a page, usually i have to refresh that page, because i get an error like "No connection" or sometimes it loads only HTML code. Almost always i cant see any pictures in Facebook, only broken links. Same is happening to the ads(if i am lucky enogh to see anything except html code). I saw many threads regarding that but non of them had helped me. Its happening with all browsers i have: IE, CHROME, MOZZILA. I will upload pictures if needed.
Things i have done:
I installed a malware anrivirus, and performed a cleanup.
I disabled all "Startup" features from Task manager.
I started the laptop in Safe mode with netword - it didnt help.
I updated the WiFi drivers, from intel's website.
I reinstalled the browsers, and cleaned all ( history, cache, cookies, etc ).

Even now, i hardly reached Dell's website, and I've already read the instruction at the main page in Internet problems. I couldnt manage on my own. 


Im getting out of ideas and im a bit worried.
I've mentioned the model of the laptop because i saw that many users from Dell and Samsung were claiming about same issue. I didnt notice if the browsers were working fine in OS 8 because i updated it immediately. I think a software or other is corrupting the connection. I have a phone and other laptop, and they are working fine with my home WiFi. 
I forgot to say that i bought the laptop with OS 8 installed and i dont have a windows disc for repair. Is it necessary that ? I spent a lot of money for this laptop and i even cant browse at internet . :(
Regards,
FarCry3