I have used my WD My Cloud Mirror without a problem with win7 and win10 pc’s since I have bought it more than a year ago. Now I have upgraded my main pc with a new motherboard and other stuff en reinstalled windows 7. The pc runs fine without any problem. But since then I can’t access my nas with explorer and with my cloud software with problems. With Internet explorer I can access the user interface for the configuration. I have a normal wired network setup. I’ve also tried to access with Wi-Fi but with the same problem. I’ve tried another router with default settings but still the same trouble. Also tried with different IP addresses and static IP address without a result.
Was Windows 7 fully updated? Did you change the Network and Sharing Center settings to match your other computers? Are you able to access other NAS devices on your network?
My Windows 7 is fully updated (incl SP1). The only thing a have changed on the network setting on the NAS is to give it a static IP address after I remarked the troubles to get connected. If I set it back to DHCP, it make no difference. I have only one NAS so I have no experience with others.
If I install the “WD My Cloud” software I can access the NAS with this software but not in explorer.