Yes.
There's no reason why it shouldn't run on Windows 8.
No. When attempted to install, the installer will display the message "this version is not compatible with Windows CE".
Yes. OpenOffice should be available in the repository for Linux, and is available on OpenOffice's website for Windows.
Yes.
Absolutely ! I've been using OpenOffice on this Windows 7 computer ever since I bought it. It works perfectly.
There should be no problem running OpenOffice on Windows 10 and OpenOffice has always been able to read Word files (there may be problems writing some of those files back out as the same Word format due to licensing issues, but if you intend on switching to OpenOffice you will be saving as OpenOffice format not Word).
Yes.
No reason why not - providing the document was saved in a format OpenOffice can read. Windows 7 is the operating system - OpenOffice is a program.
Yes - Open Office will work with Windows 7.
There is no such thing as Vista office. If you mean office 2007, yes, you can run office 2007 on windows xp. If you were to use OpenOffice instead, you could ensure compatibility by having the latest version installed on every machine which you might use, be the operating system Unix, Linux, Mac OS or any version of MS Windows. Just a thought. In my opinion, OpenOffice is much simpler and faster to use. And it's free.
To run OpenOffice on macOS without X11, you can download the native version of OpenOffice specifically designed for macOS, which does not require X11. Simply visit the official Apache OpenOffice website, download the Mac OS X version, and install it following the provided instructions. Once installed, you can launch OpenOffice directly from your Applications folder without needing to run X11.
Yes. You must have Service Pack 2 or later installed.