[H] Generalizing a Win10 installation

[Steve Tomporowski]

I'm going to sell an HP DC7800 (compact) on Ebay.  I could always wipe 
the drive, but I'd like to see it with the operating system intact.  Is 
there some way to generalize/sysprep an existing Win10 installation?  
I'd prefer to not have to wipe and reinstall.  For what I'll be able to 
get for the box, it's not worth a lot of my time.

Thanks...Steve