said by AVD:
Standard anti malware is no defense against targeted payloads.
8 years ago, I recall having a Symantec AV server pushing updates to clients. one PC HDD after another was filling up. It was Symantec's AV client not deleting the definitions...after 4 months, 40+ GB of useless files filed 15 PCs... I bought new HDDs for the first 3 that had the issue (they were under-sized so...). But then, next few days, a pattern. Thankfully, a colleague had gone through this and pointed me to the OBSCURE update patched and procedures that Symantec employed.
I got approval to dump the server software and not renew the contract (less than 100 clients/servers). I deployed Avast (cheap site license) to all the PCs along with SAS (superantispyware...MBAM was not around then). Never an infection or intrusion. Plus having Fireguard and using OpenDNS (before they went commercial for biz), it was no-brainer.--