Windows 7 Clean installiation

I am thinking of making a fresh install of windows 7 format HDD but i dont want to lose my installled programs games etc how is this possible ?

You need to do a in-place Upgrade (aka Repair install) if you want to keep programs in-place.

Otherwise, programs must be reinstalled as they write various values to registry and install files in several places. You can't copy them over as you can your data.

Clean Install Windows 7