[win8] adds Windows 8 guide

for now, copied from Windows 7 guide
[win8] update Control Panel location
[win8] update Windows Firewall text
[win8] update Startup Programs

moved to Task Manager
[win8] use Windows Defender for win8

rather than Microsoft System Essentials
[win8] automatic updates
[win8] no service packs

8.1 is an upgrade, not a service pack
[win8] update how to get to C:\ drive
[win8] handle if no Windows/Start button on screen
[win8] Process list

basically nothing open
[win8] update Program Files listing

based on clean install