If it's a Retail disk, just use Nero/EasyCD to copy the disk. If it was
a download, then burn the installer folder to CD-R (Vbox). If it came
pre-installed as part of a OEM PC then it's only on the recovery disk
and not as a stand-alone package that can be used to install it fresh.
Perhaps I don't understand exactly what you are trying to do, can you
give us more details.