You cannot copy a program from your pc, you would need the installation cd,
which you can copy.(maybe provided it has no copy protection)
When you install a program from cd it place files in various locations on
your sys, it also amends/updates the registry.
Any software installed on your pc should have been supplied also on cd,
assuming you purchased a new sys.Though some suppliers use a hidden recovery
partition. If you purchased a used pc then its up to you to ensure you get
all software cd's.