If you had told the make and model of the new machine this a member could have checked on the version of Windows for you. I'll stop here and comment your question has been answered before.
I went to download.com to get security software for my new Windows 7 laptop, but almost all of what's available doesn't list Windows 7 as a supported OS. I'm wondering if software that's Vista compatible will work for anti-virus, cleaning temp files, etc, on Windows 7.
p.s. I'm just an average user without much technical knowledge. For example, I don't know if I'm running 32-bit or 64-bit OS. It's the Home Premium version.