Can it be used in the state free antiviruses in institutions?

Question

Antivirus

I work in the library (I recently got a job) ...
In general, they even ate eset nod 32 antivirus 4 (license) (here it must be said that "grandmothers" and win xp are sitting at the PC, which in the composition just gives a huge hole, and everything is in the network, because of which all computers nearby suffer....)
But there are many machines with expired kaspersky, eset, etc....
Who knows if avast free/360 Total security/etc can be installed on these machines...
Maybe someone will give a couple of tips on how "admins" work in such establishments in general ...
PS I'm an "experienced PC user"
Therefore, if you tell me which antivirus to install and what settings to plug in, I'll be grateful.
I'm going to stick 360 Total security, because. he did not get bad results on one of the habr articles.
On computers, create an admin panel and password-protect it, and leave the usual account for use.
I don’t know what to do with the network (there is a server on which the program is located and there are clients on almost all computers. Also, all computers need an Internet. Part should be behind the censor (it is).

Answer 1

avast free - free for "non-commercial use" - won't work for you
For free commercial use provided:
Comodo Antivirus
Nano AntiVirus
AVZ
at least were

Answer 2

Of course, I'm not an admin, but if Windows is licensed, I think you can safely install Essential and relax. Free antivirus from Microsoft should not raise questions.

Answer 3

Why not contact the system administrator with a request to install an antivirus? It's system protection... It's strange that it's not done by default.