9. I’m unable to access certain websites.
Verify the DNS IP addresses assigned to the computer. Try assigning ISP specific DNS addresses or universal DNS addresses 4.2.2.1 and 4.2.2.2
Try modifying the MTU value in the router.
Step 1 : Log into the web configuration of the router by typing the IP address
http://192.168.1.1 in the address bar. A prompt for user name and password should appear. Type 'admin' as username and password both and click on login.
Step 2 : Click on setup and then name tab.
Step 3 : Now change the MTU 1492, 1482, 1472 i.e decrease it in steps of 10 and check whether now you are able to open those sites.
Apply and save the settings each time the MTU value is changed.