This hascome up before isn't Enterprise and higher version than Prpo or ulyimate?
If so,. you would be downgrding.
Anyway,.an upgrade is not the route to take. It leaves useless files on your system and can cause conflicts.
Save all you Documents, Pictures, contacts, videos, music, etc to a flash drive,
Be aware, you will need to re-insatllall your 3rd party applcations.