For about a month and a half now i have been dealing with this annoying problem on my DELL dimension E-521. The internet will be fine at night, when i wake up in the morning, i go to the internet and it says "This webpage is unavailable". I have GOOGLE chrome, mozilla firefox 3, and internet explorer and it does the same thing for all 3 browsers. To fix this i have to restart my whole computer. I tried repairing the connection once and it worked ONLY ONCE. When i tried it again it says Cannot renew IP Address. I am on a LINKSYS wireless connection. I really need help to fix this problem.