I bought an HP Pavilion dv7 Notebook just before Christmas. Frankly, I didn't and don't know the difference between 32 and 64 bit architecture in a PC. I ASSumed that 64 bit was probably the latest, greatest evolution of the PC (64 is TWICE as good as 32, right?), and that this otherwise great laptop, with its huge screen, big hard drive, 4 Gb of RAM, and dual core processor, complete with a big Windows Vista sticker, would run everything out there just fine. I am slowly learning that there are a number of programs (eFax software, for instance) and some common hardware that just flat out does not work with this 64-bit computer. The latest, most surprising, one was a 3rd Gen iPod Nano. My son got a new iPod Touch, so he gave his Nano (bought Christmas 2007) to me. It works/synchs fine with our 32-bit desktop. Tried it with my laptop; it doesn't even get recognized. Tried reinstalling iTunes, updating/reinstalling drivers, following the 10 different (many B.S.) troubleshooting steps on iTunes.com, everything to no avail. Took the Nano back to the desktop and it worked fine, again. After some online sleuthing, it seems that this Nano doesn't play well with 64-bit machines. Apple won't say it. Microsoft won't say it. It looks as if both companies have done the "Ford Pinto Cost/Benefit Analysis" and have decided that ignoring the Venn diagram subset of 3rd Gen Nano owners and 64-bit Vista users is the most cost effective route. Same story with some of the other software I'm having trouble with. Silence from all parties, but online forums condemn the 64-bit OS. Anyone else having 64-bit problems?