In general, yes; most software that runs under windows 7 will run under windows 8.
Only games that worked in Windows Vista will work for Windows 7. Unless, they are games such as The Sims or SimCity.
Yes, the Warcraft series of RTS games should work fine in Windows 7. The MMORPG World of Warcraft will definitely work in Windows 7.
Yes, they work on every other windows version.
No, they can't. It's even opposite. Most of resource demanding programs design for Windows XP only will not work with Windows 7.
Some, check out the system requirements for that game
Yes. You can install and play games in Windows 7.
It does support some of them, really simple ones. If you a game uses extensive graphics most likely you will have to look for a patch supporting Seven.
some games
Most, if not all of them. Windows Vista was released prematurely. windows 7 is what windows 7 Should have been.
Yes. Windows Live Messenger can work with Windows XP, Vista, Windows 7, and Windows Mobile.
as its new, it will work for windows 7
Yes,you can run Windows Live Messenger for Windows XP on Windows 7. And all of the other Windows Live Essentials for Windows XP work on Windows 7 without any problems. So you can install and run all of the Windows Live Essentials for Windows XP on Windows 7 and Windows Vista. You can get Windows Live Essentials for Windows XP from the Microsoft website.