Q: How can I delete my OS and replace it with windows 10 on my macbook pro

what os ? do you want to replace OS X 100% with windows with no turning back?

or do you want to replace some version of windows in bootcamp with windows 10 ?

your macbook has to support windows 10 at any rate you can read more here Use Windows 10 on your Mac with Boot Camp - Apple Support

would like a dedicated windows machine for other work.

Then why spend all that money on a Mac in the first place if all you want is a PC?

brucedot1 wrote:

 

<snip> would like a dedicated windows machine for other work.

It is not a good idea to remove OSX to make your Mac a Windows PC. You will not get hardware driver updates, Mac security updates,...

Running Windows in Boot Camp is the same as running Windows on a Windows PC and you still have the advantages of OSX if you ever want to boot into OSX. Keeping OSX allows you to independently boot into Windows or OSX. So when running Windows it is not even evident that you are not running on a Windows PC.

http://www.apple.com/support/bootcamp/

If you want a Windows PC https://www.google.com/search?q=windows+computers&ie=utf-8&oe=utf-8#q=windows+co mputers&tbm=shop