Connect yourself with a cable directly to the router and go in remove the wireless kryptation/password and try to connect to it then.
If it works theres something with the kryptation that gives you an error while handshaking between Laptop and Rotuer.
You can also scan your computer with Malware bytes to search malicious softwares. https://www.malwarebytes.org/
If you have an antivirus program, try do deactivate this while trying to connect aswell.
Also check to see that you dont have to antivirus programs installed at the same time, this usually gives alot of network problems.