If you use a printer (such as many of the Canon range) which adds a toolbar to Internet Explorer (for ease of printing webpages), it's probably a problem with the toolbar. In which case, try reinstalling the printer software.
If you're trying to print directly from Internet Explorer (either by using File>Print or Ctrl>Print), then it's likely to be a problem with Internet Explorer itself. You could try downloading and reinstalling Internet Explorer but it would be far easier to switch to a better browser, such as Firefox, which will (hopefully) allow you to print your webpages once again.
http://www.mozilla.com/en-US/
Chris