There's not much we can suggest unless you tell us more about the problem. Although you've told us you use Chrome, Firefox and Internet Explorer, you tell us nothing else about your computer. Make and model? Laptop or desktop? How do you connect to the internet? Wireless or wired? Have you tried connecting to the internet somewhere else? Are you trying to connect at home, at the office, or at a hotspot somewhere?

Have you scanned for malware? Tried turning off your firewall? How about temporarily disabling or uninstalling your antivirus?

Hope this helps and let us know more.

Grif