The More Eyes on the Full Report the Better
There are 4 Categories of Third Party Software / Services that are not needed
Get rid of them via the Developers Instruction
In no special order
Third Party 2 Way Firewalls
Commercial VPNs
Third Party Security Software
Third Party Disk Cleaners / Optimizer
That last one is my favourite and often seen on the forums
CleanMyMac , aka “ BrickMyMac “
Any Third Party Applications that will interfere with the normal operation of the OS, is an invitation for disaster.
Certain Applications maybe available on the Apple Apps Store - this only means the Developer is prepared to pay Apple a percentage on each sale.
What the Application may do to the computer is up to the User to check this out before purchase
To put the Third Party Disk Cleaner / Optimizer in context and the damages it may have or has already done.
This type of applications can or will Muck Up your User Account ( Home Folder ) of this machine.
It does not touch the Operating System itself unless you consider your User Account ( Home Folder ) as part of the Operating System.
The Operating System may be hosed