Quick fix: EWP Event error when shutting down Windows XP

if you've recieved this error, you more than likely have had a Canon printer installed at some point in time. EWP is for Easy Web Print which is an Internet Explorer Addin. To disable, go into your Internet Explorer properties.http://z.about.com/d/browsers/1/0/i/3/-/-/add2.jpg

If you're  in internet explorer go to Tools>Options

Select the Programs tab and press the "Manage add-ons" button.

You should now see a listing of add-ons in use by Internet Explorer.

Scroll down the list until you find EWP or EasyWebPrint or anything else that resembles  these names.  When you select them, press the disable radio button located below the list.

Once applied, you should no longer have issues with the EWP Event error message.

Source: http://browsers.about.com/od/internetexplorertutorials/ss/manageie7addons_4.htm