IE 7 takes too much time to open ?

try the following :

1. Have you installed any toolbars like Yahoo! toolbar, or Google Toolbar? If so, uninstall or disable the toolbars

2. Do you have any addons such as IE7 pro? Uninstall that too. Look for something that runs out of the browser such as Free download manager.

3. Make sure you run with administrator privilages.

4. Update IE 7 with windows update

5. Make sure there isnt a trojan or a virus on your system.

6. Update your antivirus regularly!