Logitech Squeezebox

I have a Logitech Squeezebox installed on a NAS. I have 3 x Duets attached to it & all work fine. I have as PC on the network running Win 7 ultimate 64bit. From the PC I can use the browser to open up the Squeeze box management screen & control playlists etc. A few days ago I changed the motherboard & cpu in my PC & reinstalled Win 7. The 3 x duets still work fine & music plays but I cannot view the management screen on my PC in neither IE11 or Chrome. All I get is the coloured background screen of the program & a continuous rotating icon saying 'loading Logitech Media Server...'  I know it has loaded as I can control what is playing from my Duet hand controllers. I can also pull up the screen on my Android Tablet by using the same IP address as I would use on my PC and all is there so it must be a PC fault & not browser or Squeezebox problem. Before I changed mb & reinstalled win 7 all was working fine. I am running Kaspersky with windows defender & firewall disabled. I have tried disabling Kaspersky but no luck.