I was recently notified that there has been Internet issues with my ISP and that a simple change of the DNS entry will fix the issue. If you're having this issue with your ISP, then follow along.

This tutorial is for Windows 7/8 as these two are now installed on most PCs, I will post a Mac version if there's a demand for it.

Windows 7/8

For Windows 7 Users:

1. Press your Start Button
2. Press Control Panel

For Windows 8 Users:

1. Move your mouse cursor to the top right hand corner of your screen
2. Once the Charms Bar comes out, press Settings
3. Press Control Panel

For both Windows 7/8:

1. On the top right hand corner, next to “View By”, change the dropbox from Category to Large Icons
2. Once in Large Icons view, it should look like this:
   
3. Scroll down and select “Network and Sharing Center”
   
4. On the left hand side, select “Change Adapter Settings”
   
5. Find your network adapter (depending if you're using wireless or not)
6. Right click the Adapter and press Properties
7. Once your Properties window comes out, it will look like this:
   
8. Select Internet Protocol Version 4 (TCP/IPv4) and press Properties
9. The Properties window will show up as shown below:
   
10. As shown above, select “Use the following DNS server addresses”. Fill in the following (Google DNS servers):
    Preferred DNS server: 8.8.8.8
    Alternate DNS server: 8.8.4.4 
11. Press OK to this Properties window and the one underneath that.
12. Internet should work now.

Hopefully this will resolve your issue.