When you try to disable a Local Area Connection in Windows XP, you get an error:

It is not possible to disable the connection at this time. This connection maybe using one or more protocols that do not support Plug and play, or it may have been initiated by another user or the system account.

1. Click Start > Run, type cmd and click OK.

2. Type netsh winsock reset catalog and press the Enter key.

3. Type netsh int ip reset reset.log and press the Enter key.

4. Restart the computer.

Check to see if you can disable the Local Area Connection now. If not, try the following steps:

1. Click Start > Run, type cmd and click OK.

2. Type net stop cryptsvc and press the Enter key.

3. Type ren %systemroot%\System32\Catroot2 oldcatroot2  and press the Enter key.

4. Restart the computer.