I have a Windows 7 32 bit workstation that is unable to connect to our windows 2000 server. until recently the the connection worked fine.

I have a Windows 2008 R2 server as a DC. I also have an old windows 2000 server attached to the network that I map as Z drive. We have 19 workstations in the network using the mapped Z drive to access an old 16 bit app that we still use. Suddenly one of the workstations (windows 7 32 bit) will not connect to the windows 2000 app.
This workstation will connect to other servers and workstations on the network.
We are using the correct logon and password
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Lionel MMSmall Business IT ConsultantCommented:
When you say won't connect, what do you mean--won't make a network connection, won't map to a share, can't connect using unc path--some more details please. Does this user have any new USB drives connected to his/her PC? Did this start after a recent Windows update?
pcemsincAuthor Commented:
The error message when trying to logon is:
"logon Failure: unkown username or password"
The username is "administrator" and the password i have confirmed as correct with 10 or mor other workstations in the same network.

This workstation is used to upload dictation files to the internet to be transcribed.  Several hand held recorderd are used and connect with usb 2.0 cable.
Internet activity works just fine as well as other local network connections to the SQL sever application and network printers.
Lionel MMSmall Business IT ConsultantCommented:
are you using username as domain-name\username?
pcemsincAuthor Commented:
The login is: cnaserver\administrator
password:   (the same as I usde on all other workstations that worked correctly)
Lionel MMSmall Business IT ConsultantCommented:
Please tru re-joining the PC to the domain, system, advanced system settings, computer name and then click on the network ID and rejoin and reboot just to make sure it is authenticating to the right server.

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