How can I tell if I have the 64-bit edition of Windows?
Answer: Your wallet is empty. Seriously, there is no way you bought an Itanium by mistake. They are expensive machines: The entry-level workstation available from HP (who co-developed the Itanium with Intel) goes for over $3000 and the entry-level server is over $13,000. And in addition to paying for the computer itself, you probably had to instal...