How do I reverse Yosemite and go back to Maverick - Desperate please

Having now pulled the very last hair on my sparse head…
I believe the problems initiated and are all related to downloading and installing Yosemite.
The quick fix is reversing this procedure… No WIFI, Network settings blown and having been unable to use Microsoft Outlook for the past 3 months.
Help - quickest and easiest way to remove and reinstall Maverick

Do a backup, preferably 2 separate ones on 2 separate drives.
Revert to a Previous OS X - Yosemite
Revert Yosemite to Mavericks
If you do revert, I'd use Setup Assistant to restore your data. This process takes a while, so do it when you won't need the computer for several hours, based on my experience.

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