Unfortunately, you cannot use your Dell OEM CD's legally on your non-dell computer. Per Microsoft those are only to be used on Dell computers. While the discs might work, technically that could be considered software piracy. The problem with all OEM ...
No not every desktop made my dell will be good for gaming. Check out the tech specs on the games you want to play. Make sure your computer meets those. I suggest trying to call Dell. The website can sometimes be more expensive because their prices ch...
If its just the OS you should be able to. However you will most likely have to use the CD key from the desktop.