so the window don't fall or break
http://www.everyjoe.com/windowsvistaweblog/windows-7-minimum-requirements/
Ntdetect.com
No specific action is needed. Just install as you would normally.
For the download of Windows Live Messenger 7 you need Windows 7, Vista or XP operating system. These are the most common operating systems around at the moment.
You needed to be more specific. However - I copied my whole CD collection onto my Windows 7 laptop, and everything plays perfectly.
audio driver for window7
The OEM license.
At least 2GB of RAM is needed (2048MB)
Yes, ActiveX is needed for many different parts of Windows operating systems and software on it.
Yes. However, it is not optimized for this task, and many of the features in Windows 7 that are enabled by default can be counterproductive to the reliability needed for a proper server.
no
Ultimate is a larger edition than Professional. If you want to downgrade you will need to buy Professional and do a clean install.