Pro to Premium network drives renaming

Hi There,
maybe just coincedence but when the Avast changed form Pro to Premium users in our office could no longer see the networked drive. We got an IT guy in and he removed Avast from the main computer and we were functional again. I had a pink fit and said we need anti virus so reloaded Avast, but now we can’t see our network drive??? Is there something we need to do in this new version of avast so the main computer shares the shared drive with our staff???. Anyone else had this problem???
used to see Local Disk (C:), Shared Disk (P:) now we see Windows7_OS (C:), Local Disk (P:) NETDVR (This Computer)
we are on windows 10
Thanks muchly Kirsty

Set the Avast Firewall to private mode and reboot.