If you're using a trial copy - you will have to purchase the activation key - from Microsoft.
You can't use your operating system anymore. Just like any other software when it expires. It's unusable.
In my opinion, no it is not, the Beta expires on August 2009, the RC expires on July, 2010, however, if you plan to purchase Windows 7, I highly recommend upgrade as Windows 7 has passed several benchmarks showing that it is faster and performs better than it's predecessors.
Hopefully you can not and the cheats will have to pay !
Yes.
I'm not sure what you mean by loader but to activate windows 7 Home Premium all you have to do is open the start menu, right click on Computer and click properties. Then click activate windows and you should be good to go.
Yes, you need Internet to activate Windows 7.
Activate Windows 7 by phone or internet connection. Search in your start menu and run Activate Windows. You will need the product key following the DVD case, email or sticker on your computer.
Windows 7 license do not "expire". The support for it will end after 2015 and you may updated using Windows Update for as long as it's lifespan. If you are prompted to activate Windows 7 you can do so by retyping the productkey found either on your PC or Windows 7 DVD. If there's been some changes to your PC you might need to activate by phone, but the activation software will guide you through all this. Search for "Activate Windows" from your start-menu to begin.
key management services
Yes, you can, but you cannot charge for Windows 7 RC (it's free). Also be aware that the RC expires June 2010, the user of the computer must buy the retail version of Windows 7 in order to continue using it after that time.
Yes. Windows 7 incorporates a licence key. Each key is unique, and will only activate on one computer.
It's the product registration key which should be on your box to activate the product