Most all of us agree that an upgrade is not the route to take. It leaves useless files on your system and can cause conflicts down the road
Save all you Documents, Pictures, contacts, videos, music, etc to a flash drive,
Be aware, you will need to re-install your 3rd party applications.
There i poll going on now and "clean" install is winning by a mile,.
Just write down your 3rd part programs so you can re-install them.
I;vie done this over 5 times myself