We have Win7 Pro and Win8 Ent Eval installed in a dual boot config.

Win7 Pro on C: drive, Win8 Ent Eval on D: drive.

Both Drives are separate standalone physical drives.

Win8 Ent Eval is soon to its 90 day eval stop.

We desire to purchase a paid Win8 PRO and install in place of the Win8 Ent Eval,

Thus preserving the present dual boot feature.

A step-by-step procedure is desired.

Thank you in advance!

Hi

You want install Win8 PRO pro in-place Win8 Ent Eval .

So you can format D drive and then install new Windows on it .

after finish install you have dual boot .