Have just read this to help me decide which version of Windows 7 to install on a Vista laptop. Hmm. Seems like my laptop is borderline! I have just bought a used Sony Vaio VGN-CR31S/L. It has a core 2 duo processor and takes a maximum of 4gb ram. So ram wise I'm on the max for 32 bit and quite low on 64 bit I guess. I am tempted to go with 64 bit, but on the Sony support webside, all the original Vista drivers
are only available for 32 bit. They do have windows 7 drivers in either 32 or 64 bit. I believe Windows 7 installs most of the drivers automatically, but this model laptop has some specific function keys, that I would need to download the software for. I have read the other post on here about how to make Sony function keys work after upgrading to Windows 7. But am not sure whether that now limits me to 32 bit or not. It would be nice to be able to use all my 4gb of ram in 64 bit. On the other hand, I guess 32 bit would be fine. But I quite like the idea of being on 64 bit as I am wondering how long it will be before 32 bit becomes extinct! What does anyone think?