IE 7 Page Cannot Be Displayed Error

I am having trouble with my internet explorer 7, it has an error with resemblance to this:
The page cannot be displayed.
The page you are looking for might have been removed, had its name change, or is temporarily unavailable.
I am using Internet Explorer as my Default browser. I tried to open another website to check if the site I was about to open is the problem, but all the URL I typed on the address bar isn't working.
I get the same error. But I can use my messenger in yahoo and windows live so I am certain that I am not having any internet connection error. But just to make sure I closed the modem then reset it, I am still encountering the error.
I cleared my cache, delete my browsing history , disable firewall temporarily but I can't seem to make it work. I tried running my anti virus but my system is clear from any virus. I am using win XP pro.
The last session I had before the error, to a site where I downloaded an update for Adobe Flash Player. Upon starting my system today,
I can't seem to connect to any site on Internet Explorer.
Please help me on this.
