Light energy is trapped by a green chemical called chlorophyll. In photosynthesis, light energy is converted into chemical energy. When animals and plants respire, the chemical energy in glucose can be converted into other forms of energy e.g. kinetic energy.
McAfee is a very reliable antivirus program giving protection from antivirus and other infections to the users since past three decades. It is very effective in fighting new real time threats a dependable software for protecting your system however sometimes users face virus threats in spite of having McAfee installed.
I've used McAfee in its different versions for 12 years without a problem but when it wouldn't update I switched to AVG Free Edition. AVG picked up on a virus that McAfee couldn't find, so AVG is great and McAfee is s***. I think you'll find that all anti virus apps use a lot of system resources. Why do you need them running all the time, I don't. If you have a suspect file or download then check that file for a virus.