I'm having the same problem.
Tried this local policy, but this does not fix the problem.
When replacing a keyboard, mouse, cardreader, screen,... windows xp prompts
for the administrator password.

"manual updates" wrote:

> Additional local security policy to consider:
>
> http://www.microsoft.com/windows2000...-us/gp/543.asp
>
> Load and unload device drivers
> Computer Configuration\Windows Settings\Security Settings\Local
> Policies\User Rights Assignment
>
> Description
> Determines which users can dynamically load and unload device drivers.
> This privilege is necessary for installing drivers for Plug and Play
> devices.
>
> This user right is defined in the Default Domain Controller Group
> Policy object (GPO) and in the local security policy of workstations
> and servers.
>
> The default groups that have this right on each platform are:
>
> Workstations and Servers
> Administrators
> Domain Controllers
> Administrators
>