Homegroup not working since router change

[apollo911]

I have a PC and two laptops running W7 HP which have been happily connected via a Homegroup since W7 Beta.

Last week I had to replace my router and in doing so change the wireless SSID and security key which the two laptops use - the PC is connected via ethernet.

Now both the laptops can see each other and the PC, but the PC can only see one of the laptops - the other doesn't appear under Homegroup at all.

I tried changing the Homegroup password but it didn't help.

Any ideas welcome.

 

[ryo]

can you tell us know,what the spec of your 2 PC and laptop.

give a more details, can easy to solve it.

cheers.

 

[apollo911]

PC Gigabyte EP45-UD3R E6750 4GB W7 HP x64
Laptop1 Dell Inspiron 9400 Intel Mobile Core 2 Duo T7200 W7 HP x86 3GB
Laptop2 Intel Pentium M 750 2GB W7 HP x86

 

[JamesR404]

I have no idea, but I'm curious. What other details do we need to resolve this guys?

 

[chev65]

You may need to create a new Homegroup because of the router change.

As for the machines that can't see each other, which A/V software or third party firewall are you using?