Lets first troubleshoot your system I Explorer, Try These:
Step 1: Open a blank page in Internet Explorer
Test Internet Explorer by opening a blank page. To do this, follow these steps:
Click Start, click Run, type iexplore about:blank in the Open box, and then click OK.
If Internet Explorer does not start, go to "Step 3: Start Internet Explorer in 'No Add-ons' mode." If Internet Explorer starts correctly, follow these steps to use a blank page as your home page:
On the toolbar, click Tools, and then click Internet Options.
On the General tab, note the address that is listed in the Home page area. This address may cause the problem.
Click Use Blank, and then click OK.
Close Internet Explorer. Then, start Internet Explorer again
Step 2: Remove temporary Internet files, browsing history data, and Web form data
To remove temporary Internet files, browsing history data, and Web form data, follow these steps:
Windows Internet Explorer 8
Start Internet Explorer.
On the toolbar, click Tools, and then click Internet Options.
On the General tab, click Delete in the Browsing history area.
In the Delete Browsing History dialog box, click to clear all of the check boxes except for the following check boxes:
Cookies
History
Form Data
Click Delete.
Click OK to close the Internet Options dialog box.
Step 3: Start Internet Explorer in "No Add-ons" mode
To start Internet Explorer in "No Add-ons" mode, click Start, point to All Programs, point to Accessories, point to System Tools, and then click Internet Explorer (No Add-ons). To continue to your home page, click the Home button.
If the problem does not occur after you use this method, use Manage Add-ons to determine which add-ons are causing the problem. To do this, follow these steps:
Windows Internet Explorer 8
Click Tools on the Internet Explorer toolbar, and then click Manage Add-ons.
Click the name of the add-on at the top of the Toolbars and Extensions list, and then click Disable.
Click Close, and then test Internet Explorer.
If the problem still occurs, open Manage Add-ons, enable the add-on that you disabled in step 2, and then repeat steps 1 through 3 for the next add-on in the Toolbars and Extensions list.
Repeat steps 1 through 3 until the problem is resolved or until all the add-ons have been tested.
Try these steps, you will get some idea of the problem. Also you need to make sure that the Internet is working.