Hi Gail

You need to slave the old hard drive. Put it back into the machine attached
to the same cable as the old one. On the back of the drive are the jumpers.
These will be labeled as such. Set the jumpers to cable select or slave
(follow the little diagram or google it)

When you boot the old hard drive should be detected as a Primary slave drive
and should appear in my computer with a drive letter of D(or similar).

If it doesn't appear right click my computer and choose manage. Select
storage and disk management(local). look for any new drive will probably be
(D:) if your windows drive is (C:) and your CD/DVD Drive is (E:). Right click
and choose import and the drive should become available. Any problems post a
reply back on here and we will try something else