RN204 - anti virus finding multiple infected files

Hi Sandshark

Thanks for your reply. Sorry for the big gap in time to respond to you.

I have carried out a factory reset (Wednesday) and for a couple of days there were no reported viruses. I gradually copied back data to some of the shares. (not the one in the root folder) Yesterday I had a notification of viruses in some .eml files today an additional virus and trojan same as before. The infection seams to follow a similar pattern .eml first then onto dropping virus etc into .dll and .exe. Theses latest infections are on a shared folder so I scanned using AVG from my laptop. No malware was identified. 

As you say the issue is seeing how the infections are getting onto the NAS as all of the connected devices are running AVG.  After the factory reset I imported the configuration file previously saved.  This had been scanned as reported as clear.  To date there has been no infections reported on the NAS I use for backup. (RN214)  

Today I have removed FTP and ReadyDLNA services. Could these have been the route in?

Further information the infection is turning off the Antivirus service which I keep turning on. I have just tried to download a custom configuration file and this was declined as being insecure by the browser I am now using AVG secure browser. 

I have raised a query with AVG and am awaiting a response.

I am now considering another Factory reset and not importing a configuration and resetting from scratch the shares users etc.  Do you think this is a sensible route?

Thanks for the help