Unable to "access" PC on Home Network : No Access Permission

I have set up a home wireless network with a desktop (running XP Pro) and 3
laptops (2 x XP Home & 1 x Vista Home Premium). All machines can "see" each
other and able to access every other PC on the network, except: None of the
laptops can explore the desktop. All come up with the same message that the
desktop is not accessible. Access is denied and I do not have access
permissions.

I am running all machines with my user account and full administration rights.

I have been through the Microsoft Help and Support but have not found a
solution. My guess is that it is some setting in Network Connections on the
Desktop that is causing the problem but despite trying various things, I have
not got an answer.

Any help with this would be much appreciated.

 

Hi
Successful Sharing involves some general consideration in Network settings,
http://www.ezlan.net/sharing.html
As well as specific adjustment of each computer according to what it is
allowed to be shared.
Vista File and Printer Sharing-
http://www.microsoft.com/technet/network/evaluate/vista_fp.mspx
Windows XP File Sharing -
http://support.microsoft.com/default.aspx?scid=kb;en-us;304040
Printer Sharing XP -
http://www.microsoft.com/windowsxp/using/networking/expert/honeycutt_july2.mspx
Windows Native Firewall setting for Sharing XP -
http://support.microsoft.com/kb/875357
Windows XP patch for Sharing with Vista -
http://support.microsoft.com/kb/922120
Jack (MVP-Networking).

 

I will check all of this out. With thanks.