Felt this worth passing along. With Christmas coming up, I can see where this could be a real problem.
The newest virus circulating is the UPS/Fed Ex Delivery Failure. You will receive an email from UPS/Fed Ex Service along with a packet number.. It will say that they were unable to deliver a package sent to you on such-and-such a date. It then asks you to print out the invoice copy attached. DON'T TRY TO PRINT THIS. IT LAUNCHES THE VIRUS! Pass this warning on to all your PC operators at work and home. This virus has caused Millions of dollars in damage in the past few days.
Snopes confirms that it is real.