Actually we are using 3 operating systems :-)
The most dependable operating system still seems to still be XP. We recently bought new computers with Vista Home premium preinstalled, so rather than format the drives we opted to set up a dual boot on both computers with XP professional. Vion’s older computer, destined for Alonissos, where our summer home is, has a dual boot with XP Professional and Linux Xubuntu. A dual booting system has advantages because if one operating system fails, for whatever reason, you can usually use the other to access your files.
-Windows XP still rules.