What OS do you use?

[YuDaMan]

Windows 7 Ult 64 bit...its ok

 

[Winneon]

I have a Windows XP Home Edition 32-bit OS.

I don't really like it now, though, because it sometimes freezes and is
REALLY slow. I would prefer a Macbook Pro with Mac OSX Lion.

 

[Kaean]

I use a combination of windows XP (on an older laptop I got from a friend), Vista (on my very first laptop), and Windows 7. I much prefer windows 7 but haven't gotten around to upgrading my laptops. Plus I was thinking of installing Linux on one of them to get more familiar with it.

 

[Cordelia]

I use PCLinuxOS KDE edition on both of my computers.

 

[Carlton]

Windows 7 for Desktop; Linux Ubuntu for Programming.

 

[kohei]

Windows 7 HP 64-bit on my desktop, Windows XP Pro 32-bit on my lappie.
Lappie had Ubuntu installed too, by I haven't installed it back in after my first HDD died.

 

[quilzel]

I mainly use Windows 7 Pro, but I also use Ubuntu, Ubuntu Server, Windows Server 2003, 2008, and 2008 R2.