Wireless LAN denying permissions to connect to machines?

[AmDaMan]

Right, i've set up a small wireless (and 1 wired) network up in my house. All the connections go to the Netgear router / gateway / modem.

They all connect to the internet and I can print files downstairs (using a dedicated print server) So i know at lease some of the sharing works.

The domains have all been set up the same and i've checked the TCP/IP settings, it's all done via DHCP for ease (i've tried manually assigning Static IP's but it's the same)

I can share folders between pc's so I can access a folder by sharing it an running \\computera\shared folder but if I just do \\computera it denies me access saying I don't have access? Annoymous access is also enabled (although this shouldn't matter) and i'm not sure what to do next?

It's not a firewall issue either.. Do users need setting up on each PC? eg does 'computera' need an account on 'computerb' and vice versa in the local security policy?

I need this to work as i'm trying to set up a remote shutdown via SMS working. 'shutdown \\computera -s' as computers sometimes get left on over night (yes I could use scheduled tasks with a batch file, but getting this working would be useful in other ways too)

 

[IAmATeaf]

Setting up the same users with the same password will make access to share easier but isn't strictly needed, what is needed though is to ensure that your users have passwords, you should then get a dialog prompting for username/password.

 

[AmDaMan]

I disabled the guest accounts on both pc's I then went to the group policies and added administrator into guest. It's now spot on but is there a more secure way to acheive the same result?