Make sure SMBv2 is enabled on both PCs. You can check this by entering "Get-SmbServerConfiguration | Select EnableSMB2Protocol" (no quotes) into an admin Powershell. If the output of this command is false, then you can enable it by entering "Set-SmbServerConfiguration –EnableSMB2Protocol $true" (no quotes) into the same admin Powershell. If your still having issues, you should make sure all of these services are enabled and set to automatic:
· DNS Client
· Function Discovery Provider Host
· Function Discovery Resource Publication
· Peer Networking Grouping
· HomeGroup Provider
· HomeGroup Listener
· SSDP Discovery
· UPnP Device Host
Another thing you should check is the PCs are in the same workgroup.