All computers today come with a free built in virus scanner, well at least all windows 10 computers do it’s called.
Windows Defender, it monitors everything from what applications can modify your file folder system to who can access your computer externally/through the internet, it comes with a firewall, real time protection, browser and app controls, and alot more..
Its built by microsoft the same people who designed and managed the operating system it will always get the latest updates before any aftermarket company..
Aftermarket virus scanners can be a great helpful thing that will keep your computer virus free and healthy. they can many times remove viruses that Windows Defender or other aftermarket scanners cant..
Because aftermarket virus scanners get there updates much later then windows defender it can be bad in many ways. Imagine this Microsoft releases an update containing files that control the way the computer boots, but since the aftermarket scanner has not been notified of this it thinks this is a malicious act and does not allow the update to change a couple of important system files.. Now we have an update that is missing a few important files and a computer that can no longer boot due to this.
This is just one scenario we can think of there are many many more possibilities..
