Windows 7 64bit nearly in the lead.
 

In installed user machines :)

http://www.tomshardware.co.uk/window...ews-33837.html

I have to say, when i upgraded to Win7 and asked on here regarding the 64 vs 32bit choice, i can remember 2 chaps having a little barney about it, something about how one was more of a geek than the other :lol1:

The only problem i had with 64bit was my Epson printer driver that i use to print work spreadsheets, but seriously, that printer was about 20 years old, so i simply replaced it.

I have had the odd minor niggle a few games, but they have all been easy enough to sort (apart from Saints Row 2, i can not get that POS to work)