Windows XP security

I have a new customer that has a T-1 line which is shared among a few offices. All PCs have windows xp home or pro.  I disabled simple file sharing so that you can't just access any of the shared resources by just clicking on them.  The only problem is that it when someone on the network tries to access the resources it has a guest login that you can't change. Is there anyway to make them have to enter a username and password?
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Windows XP (at least PRO) defaults a setting in Local Security Settings to something very unhelpful.
Check Local Security Settings, Network access:
Sharing and security model for local accounts.  
This may be set to (default) Guest only - local users authenticate as Guest.  
Change this to Classic: local users authenticate as themselves.

Start/run: gpedit.msc
   Local Computer Policy
     Computer Configuration
      +Windows Settings
         +Security Settings
           +Local Policies
             +Security Options
          Double-click on Network Access:Sharing and Security Model for local accounts--
                 --change to "Classic - local users authenticate as themselves"


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try disabling the guest login on all the computers and create a test user account... attempt to connect to the share...
pcmagic2004Author Commented:
gdplus..... do i have to change this setting on all local accounts I want to be able to authenticate as a user?
Also, will other users in the same network be able to put there username and password in and get access?
pcmagic2004Author Commented:
you're the man gd...thanks
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