After you upgrade a Windows XP-based computer to Windows XP Service Pack 3 (SP3), and then you restart the computer, you cannot connect to an 802.1X wired network to which you were previously able to connect.
In Windows XP Service Pack 2 (SP2), both the wired and wireless connections are handled by the Wireless Zero Configuration (WZCSVC) service. Additionally, this service is always running. In Windows XP SP3, this WZCSVC functionality is divided into the following separate services as part of Network Access Protection (NAP) integration:
The WZCSVC service
The Wired AutoConfig service (DOT3SVC)
The WZCSVC service in Windows XP SP3 manages only wireless connections. The Wired AutoConfig service manages wired connections, and the startup type of this service is configured as Manual. Therefore, you cannot connect to an 802.1X wired network until you manually start the Wired AutoConfig service.
To resolve this problem, use one of the following methods, as appropriate for your situation.
Method 1: Manually start the Wired AutoConfig service
If you are an end-user who has already installed Windows XP SP3, follow these steps:
Click Start, and then click Run.
In the Open box, type services.msc, and then press ENTER.
Locate the Wired AutoConfig service, right-click it, and then click Start.
Method 2: Deploy Windows XP SP3 by using a GPO
If you are an administrator who wants to automatically start the Wired AutoConfig service and to deploy Windows XP SP3 on multiple client computers, follow these steps on a domain controller:
Step 1: Pre-deployment
Create a file that is named "Dot3svc_start.reg," and then save this file to the following location:
\\Domain name\sysvol\Domain name\scripts
Add the following text to the filethat you created in step 1: