Sophos Anti Virus hogging your processor? Can't remove it because of tamper protection?
# change into preferences
cd /Library/Preferences
# confirm locations of sophos files
ls com.sophos.*
# remove all sophos prefs,
sudo rm com.sophos.*
# this will now allow you to remove sophos
# change into the installer
cd /Library/Application\ Support/Sophos/opm/Installer.app/Contents/MacOS/tools/
# remove
sudo ./InstallationDeployer --remove
# enjoy not having sophos eating up your processing % while you are trying to work!
Also see https://gist.github.com/omundy/8549b38367a0d207c64992dd9cda737b