Rod Speed said:
Just one partition for the whole hard drive.
No point over one partition for the entire hard drive.
There is, like for keeping files you want to keep between
installations of Windows. Having those files on the hard drive ready
to go in their appropriate folders after a reinstallation is very
useful
Fortunately, reinstallations don't occur as often these days, but
keeping non-CD files on a non-primary partition is still useful.
The difference is files that come locally from the Windows CD or
program CDs during installation, those files versus files you
download (for example downloadable software and program updates),
files you don't keep on removable media like movies/whatever, and
personal files you generate (and always want to have additional
copies of).