Two Sonos homes and PC's are having hard time switching

I have two homes and only my PC's have a hard time when resetting themselves to control the local Sonos Bridge. the IPAD's, i phones, Androids all switch instantly but the windows controllers do not. it detects the bridge then says "cannot connect check your firewall blaa blaa blaa... yes i have reset everything including firewall, modem and yes i have firewall on all three of my laptops completely disabled in services. Disabled Antivirus in services as well on all three PC's. Why is the Windows platform controller app so fussy? and why doesn't Sonos have provision to keep the info from multiple different bridges? last year this same thing happened so this time i brought in a new router (Netgear WNDR4500) and returned the ISP router which was really old... anyway same as last time the PDA's all worked but the PC's do not.

ideas? did i miss some steps to get it work?

thanks