Method 1

1. Click Start, and then click Run.
2. In the Open box, type appwiz.cpl, and then click OK. It may take several seconds for your computer to compile a list of programs.

Or Go to Control Panel >> Add/Remove Programs (Programs and Features on Vista and 7)

1. Scroll down through the list and click Windows Internet Explorer 7, and then click Remove.

Note: If you can't find internet explorer 7 check the view installed updates.

Method 2.

Step 1: Make hidden files and hidden folders visible

1. Click Start, and then click My Documents.
2. On the Tools menu, click Folder Options.
3. Click the View tab.
4. In the Advanced settings list, under Hidden files and folders, click Show hidden files and folders, and then click OK.

Note: In Windows Vista and 7, you can access Folder Options in the Control Panel
Step 2. Uninstall Internet Explorer 7
To uninstall Internet Explorer 7, follow these steps:

1. Click Start, and then click Run.
2. In the Open box, type %windir%\ie7\spuninst\spuninst.exe, and then click OK.
3. Follow the wizard instructions to uninstall Internet Explorer 7.