Try clearing out your cache and DNS cache.
How to flush DNS cache in Linux / Windows / Mac - Techie Corner
To flush DNS cache in Microsoft Windows (Win XP, Win ME, Win 2000):-
- Start -> Run -> type cmd
- in command prompt, type ipconfig /flushdns
- Done! You Window DNS cache has just been flush.
CCleaner - Download
Download ccleaner and install it, once done let it scan your computer for any excessive clutter in all of your browswers and windows.
Let it clean what it decides whats best for you and restart your computer.
May I ask which OS you are using and the browser versions you have on your computer ?
You might need to update all of your browsers if needed and they are old.