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We have computer with two disk drives C & D. Windows xp home is the OS on
drive C.
We use the drive D as storage. My brother wished to install the same windows
on D (D its capacity is 80 Giga)
So I formated the D for him to be ready for installation of the OS (xp
home).Now the drive D is formated so it does not contain any DOS files.Some
persons in newsgroup advised to do copy of OS on C and do paste in D. I did
but when I boot the computer the only OS in C works while D works as a
storage for copied window files.
Please any person can help.
Thank you all.

Hardy &&& wrote:
> We have computer with two disk drives C & D. Windows xp home is the OS on
> drive C.
> We use the drive D as storage. My brother wished to install the same windows
> on D (D its capacity is 80 Giga)
> So I formated the D for him to be ready for installation of the OS (xp
> home).Now the drive D is formated so it does not contain any DOS files.Some
> persons in newsgroup advised to do copy of OS on C and do paste in D. I did
> but when I boot the computer the only OS in C works while D works as a
> storage for copied window files.
> Please any person can help.
> Thank you all.

You have to install the OS to the D: drive thus giving you a dual boot
machine, copying the files will not work.

How to install or upgrade to Windows XP
http://support.microsoft.com/?kbid=316941