Is it possible to prevent malware in a pc. I do not want to install any antivirus, this slow down the system. I have a few old pc which are running shop software. They are only used to record the products in warehouse. They are interconnected through lan. There is no use of upgrading them. Whenever we add a antivirus they work really slow. So I want some basic preventive measures through which we can avoid virus in them.
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