What kind of operating system do you use - 32-bit or 64-bit? 64-bit was just introduced less than 4 years ago, how quickly has 64-bit become popular to use.. If you use both, then vote for the one that you prefer (e.g. you have Vista x64 and Vista x86 but prefer Vista x86 because it's more compatible with the programs you use or is more stable in general, etc.) Another question (not for voting in poll but to answer in reply if you want): You may have 32-bit now because when you got your computer 64-bit wasn't available or wasn't popular, compatible, and reliable enough. If you were to go out and get a new computer today, which kind of operating system would you get: 32-bit or 64-bit.