I can't use internet

Assuming that I am understanding your problem correctly, you can connect via your wireless access point, but Internet Explorer isn't working on your computer? Does the problem exist on the other computers as well? It would appear that you have a connection, just no browser. If the problem is simply the browser not working on one computer (your laptop I presume), then download another copy of the browser on a different computer, save to a flash drive and reinstall it on the problem system.

The browsers can cache web pages temporaily and stores the URL's to recently visited web pages in the history folder. I also would suggest having more than one browser on every computer because of problems like this. The most popular and sometimes the primary browser used is Mozilla Firefox from www.mozilla.com.

Browsers do not resolve the web domain name (URL) This name resolution is performed by a Domain Name Service Server (DNS). Your ISP most likely also has a DNS server and provides the address resolution for your queries on the internet. Hope this helps.