If you are always getting Access Denied errors when trying to connect to a XP computer, 
and you know you have the correct user names and passwords on the computer, 
the solution may be a simple registry edit.
*Start>Run> Regedit 
*Go to HKEY_LOCAL_MACHINE / SYSTEM / CurrentControlSet / Control / Lsa 
*Change the value of a key called "restrictanonymous" to 0 instead of 1 
*Don't change "restrictanonymoussam" value. 
*Reboot
 
