If I Install a Pirated Microsoft Office 2007 on a Legal Windows XP System. Will It my Operating Syst

If I Install a Pirated Microsoft Office 2007 on a Legal Windows XP System. Will It my Operating System Invalid.

If I Install a Pirated Microsoft Office 2007 on a Legal Windows XP System. Will It my Operating System Invalidanti virus protection

Maybe not but when everything updates it might make the ILLEGAL Microsoft Office no longer function properly.

If I Install a Pirated Microsoft Office 2007 on a Legal Windows XP System. Will It my Operating System Invalidantivirus

yep! The last office you could do that with is 2000.
No, your OS Will still pass WGA, But for MS Office Updates updates Microsoft does check the Office Key
No, invalid office will not make a valid windows install become invalid. You will not be able to get updates for your invalid office.