Symantec/Norton are responsible for BSOD ( Blue Screen Of Death )
see story

These two anti-virus programs also use a lot of system memory and they will slow down the system.

They will also conflict with one another.

You don’t need two programs to do the job of one.
You just need to use the most effective program you can get.

not a good idea. they will interfere with each other. having two security programs for the same thing can actually increase the risk of infection because they might disable each other

Its not recommended, as very often, one program will conflict with another, and will result in neither of them working properly, i would suggest picking one and sticking to it

You CAN run two different internet security systems on your computer, but it is not recommended. For example two kings were fighting for the protection of the throne, but even through all these conflicts they only ended up making it worse. So having two different security systems are not a good idea. Instead of having better security ,in which you might think, you’ll probably end up with more malware.

mate it depends on the programs but don’t because i tr-yd to use Zone Alarm and AVG and they fort each other i had to get it sent to a computer dude

No, one or the other.