This is not the way to advance your company’s way to world domination:

During a presentation to announce Symantec’s latest product, a spokesman for the company delivered an enthusiastic pitch to a roomful of big name clients. Indeed, such was the emphasis on the “uniqueness” of his company’s offering that attendees could have been forgiven for thinking that no one else made anti-virus software.
…
During the wrap-up to his presentation, the spokesman was forced to query collective laughs, and quite possibly shouts of “it’s behind you”, by turning to face his presentation screen.

He found the source of their amusement in the form of a prominent pop-up box, obscuring his Powerpoint presentation, stating that the rival Kaspersky anti-virus software loaded on the machine he was using to present had updated its definitions.

Oops.

Lesson 1: use your own product.

Lesson 2: if you don’t trust and use your own product, it’s time to quit.

Lesson 3: do not use a test machine/competitor testing machine for presentation use.

Lesson 4: 99% of salesmen are liars. Yes, I made that figure up. Go figure.