I am a tad confused.
You have bought two PC's or only one PC and you say that the operating system is a copy or something? What gives you that idea? As for the motherboard disks and driver disks for printers ETC these are easily enough to find. But first we must get your PC to work.
Do you have the Windows 7 COA number which should be on a sticker on your PC somewhere or you can find this out by using Belarc which will tell you the number.
Belarc will also tell you what motherboard you have and with that information we can find the driver download page.
Same with printer, post make and model we will link to the drivers.
The cameras should work once Windows 7 is sorted.
You can also download and burn to disk a copy of Windows 7 Ultimate from here.