Yes they are... Each successive version of Windows comes loaded with more and more drivers for printers and other peripherals. Chances are your printer will work without additional drivers (it worked with mine !)
Most sold printers will be compatible with Windows 7 as of 2016. It's up to the manufacurer of the printer to create the drivers used for that operating system. Most printers and PC's today use the standard network and or USB connection.
Yes, if you have the driver to install it.
Office 2010 is compatible with Windows 8 running on a Mac. It is not compatible with any Mac OS.
Fairly simple to install. Yes compatible with Windows 8 or 8.1.
No
yes, from windows XP to windows 7, but only windows!
yes
Currently The Deadly Device is the only Nancy Drew PC Game that is compatible with windows 8. However all releases from now on will be windows 8 compatible.
Yes it is.
Yes.
No.