Don’t do this.
A customer complained because her laptop was very slow. Beside the fact that it is old and under-powered, I found installed:.
McAfee Security Scan Plus.
McAfee Web Advisor.
Avast.
Hotspot Shield.
Pc Protect.
Pc Accelerate.
Pc Keeper.
Driver Updater.
Most of these software are completely useless, when not dangerous, and if you believe that using 3 or 4 antivirus software is better than one, you are completely wrong. These software fight to each other and the result is a terribly slow computer. Trust a computer professional. In the long run it will cost you less than fixing the mess you self-created or the need for a new computer…