You could try to repair IE by following these two methos:

Method 1: Microsoft Internet Explorer 6.x Repair for Windows XP

* From the Start menu, select Run.
* In the Open field, type sfc /scannow (Note: There is a space between sfc and /scannow)
* Select the OK button.
* Follow the prompts throughout the System File Checker process.
* Reboot the computer when System File Checker completes.

Method 2: Microsoft Internet Explorer 6.x Repair for Windows XP

* From the Start menu, select Search, select All Files and Folders.
* Select More Advanced Options and place a checkmark beside Search Hidden Files and Folders option.
* Ensure that Search System Folders and Search Subfolders are also checked.
* In the All or Part of the File Name box, type ie.inf
* In the Look In drop-down menu, select C: or the letter of the hard drive that contains the Windows folder.
* Click the Search button.
* In the search results pane, find the ie.inf file located in Windows\Inf folder.
* Right click the ie.inf file and click Install on the context menu.
* Reboot the computer when the file copy process is complete.