Dell 1720 - Vostro - Core 2 Duo 2.2 GHz User Manual page 20

For Windows Vista (default Start menu):
a. Click ® Control Panel.
b. Click Hardware and Sound.
c. Click Printers.
2. Double-click the printer you are using to print the job.
A list of print jobs appears.
3. Right-click the document you want to stop printing, and then click Cancel.