Due to ISP charges for breaching the monthly data limit, I started to investigate what applications are using this data. Installed Networkx data usage monitor on the 3 systems and it shows that vsmon uses as a percentage of all internet traffic: 90% on my system, 50% on my sons laptop (he streams videos) and 80% on my partners laptop.
All systems were set to hourly antivirus updates. Looking at my system in detail it would appear that zonealarm replaces the entire virus database on each update regardless of version number or does not check first to see if an update is required . The logs show the same version number repeatedly as updated successfully.
This is an excessive amount of data 6Gb in 5 days on one laptop.
I have had to disable auto update on each machine and will only switch it on once a week.
Can you explain why this is necessary?