I’ve been getting occasional emails with the subject “United Parcel Service notification” and the following text:

Dear customer.

The parcel was sent your home address.
And it will arrive within 7 business day.

More information and the tracking number are attached in document below.

Thank you.
© 1994-2011 United Parcel Service of America, Inc.

There is an attachment with the email that is called United Parcel Service document.zip or UPSnotify.rar, though there are other names, too. The attachment isn’t a document at all, of course: it’s a trojan horse designed to infect your computer with a virus (called TROJ_SPYEYE.SMEP) that allows others to control it. Trend Micro says the “controlling” site for the virus has since been shut down, so the risk may be low.

I’ve read that these fake emails also masquerade as coming from FedEx and DHL.

As always, do not click on links or attachments from people or services you don’t know, especially if they are written in poor English. Also, consider switching to Linux or a Mac.