Earlier this I had an interesting problem where Internet Explorer would not launch all the way on a friends computer. When the IE application was clicked on it would flash on the screen and then close immediately. I believe there was either some form of virus left on the computer that was closing Internet Explorer or that the upgrade I had just performed of IE6 to IE7 was causing a different issue. My initial plan was to continue upgrading Windows XP on this friends computer but I could not do this on the Windows Update site without Internet Explorer. Below is a work around if your Internet Explorer is not functioning properly and you would like to try to apply Windows patches from the Windows Update site anyway.
After switching from Windows XP to Windows 7 on my new laptop I also changed my primary browser from Microsoft Internet Explorer to Google Chrome. I have been really happy with the results as Chrome is really lightweight and runs very smoothly. One thing I was initially not happy with was the fact that I used Google Toolbar all the time with Internet Explorer and it was not available for Chrome. I then spent some time researching all of the Chrome extensions I would need to install to simulate everything that I was able to do with the Google Toolbar installed in Internet Explorer.