Yes, according to: support.microsoft.com/kb/822129
Yes, Microsoft Office 2003 is compatible with Windows Vista.
Yes, Microsoft Office 2003 is compatible with Windows 7.
Yes, if you purchase Microsoft Office 2010, it will be compatible with Windows XP. If you get the newer version like Microsoft Office 2013, it will not be compatible with Windows XP.
Microsoft Windows 7 is compatible with Office 2000 but updating Office might not be possible. Outlook 2000's contact list will not work with Windows 7.
All versions of Microsoft Office (with the exception of those created for Macinthoshes) up to and including Office XP are compatible with Windows 98.
No. Office 2011 is only for Mac OS X. The equivalent for Windows is Microsoft Office 2010. Microsoft Office 2010 will run on Windows XP.
Yes.but Microsoft Office 2007 is not
Yes.
Yes, Microsoft Office 2003 is compatible with Windows 7.
No, it will run in Windows 7 thou.
Yes.
Yes.