Following a few sale purchases today and starting my downloads NORTON antivirus suddenly reported 'Suspicious@ behaviour on galaxyclient.com (SONAR.AM.C!g24) I felt I had no choice but to allow NORTON to quarantine the galaxy client. Please tell me this was a false alarm and that my card details are safe. I assume after quarantine I assume I will need to do a complete fresh install of Galaxy client, obviously assuming it is indeed false alarm.
Cheers

We're discussing this in your other thread:

https://www.gog.com/forum/general/norton_security_flag_on_galaxy_client

Yes, it;s a false positive.

A quick google for the name of the "virus" should show other discussion that it;s a false positive on Norton's part.

It was a false positive cleared my Norton back in December 2016. You need to run a ***MANUAL*** update on your antivirus as well as the program's signature files.

Hope this helps