Strange computers appearing in Finder's 'Shared' column

[applemax]

Hi

These have been appearing for a while in my shared column in Finder as 'PC Servers' - I'm aware they're duplicate references for my actual computers but how do I remove them?

Thanks

 

[mperkins37]

If they are all your machines, there shouldn't be anything to worry about.
Having said that go to sharing & turn all options off, as well as go into airport setup & secure your settings so you have to use a password to see the network.