Hi
If you did a fresh install of Windows it comes with the default security
settings, it might be that the Firewall blocks File sharing.
Since you did not indicated which type of Windows you installed be my guest

to both Win XP and Vista.
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/net.../vista_fp.mspx
Windows XP File Sharing -
http://support.microsoft.com/default...b;en-us;304040
Printer Sharing XP -
http://www.microsoft.com/windowsxp/u...utt_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).
"dianne" <dianne@discussions.microsoft.com> wrote in message
news:C4566C16-347D-43D7-A13F-D6A74AB7D271@microsoft.com...
>I completed a hard drive change on my Host computer that was originally
> networked with 2 other wired and 2 wireless computers in a small home
> based
> office. We have cable modem with router and an additional network hub in
> an
> adjoining room. The host will communicate with all other computers. All
> other computers will communicate with others except the host. They are
> all
> in the same workgroup, host name shows up in all computers, but can't make
> them talk to the host. Mcafee antivirus on some, Norton anti-virus on
> one.
> Any suggestions for what to try next?
> --
> dianne