What Operating System do you use ?

[cubelmariomadness]

I forgot to mention that I have Ultimate windows 7. Vista used to work great, then someone stole my ram. 

[manuel]

How can someone steal RAM? 
Open the computer and take it out? 

[Peps1ru1es92]

Or a really elaborate Virus 

[ericj]

I use Windows XP Media Center Edition. I tried Vista for about a week. You can guess how that went.

[Mindfreak]

Lol yeah its been hard to get away from the Microsoft giant, but Linux is the best OS I've ever had and I plan on making my own version soon

[cubelmariomadness]

How can someone steal RAM? 
Open the computer and take it out? 

I don't know. It might have been my dad because he maybe thought "Hey, he won't use these with a 32 bit os" Then snatched them and sold them on ebay. But that's my wild imagination. 

[shoggoth80]

Pretty much all of them 

Depends on circumstance.
My desktop is a Mac...so it's OS 10.6.5
My netbook.... Linux all the way. recently put a version called Peppermint on it...which is a Mint derivative...which is itself an Ubuntu derivative. I like open source, a lot... and have used it on my previous desktop....and my previous laptop (Linux on mobile used to be pretty tricky... but the distros are getting better and better about hardware compatibility/drivers).
I pretty much only use Windows when I am forced to... and that is usually either a public use computer on campus, or my girlfriend's tower, which has XP on it (had a couple classes the other term that required an add in for Excel that was only available on the Office 2007 version, which was on her tower).
Tried BSD for grins, like it, but had driver issues with my hardware. Haven't gotten Solaris to run on my netbook, though tried...the Kernel gets corrupted using UNetbootin.
I use Atari TOS on my ST 1040 computer. Little green desktop, little green desktop...