Extender Setup Configuration Error

Hi Searched all around...none of the solutions offered fixes my problem. Hope you can help.

After entering the 8 digit code on my Windows 7 Ultimate PC in the extender setup, I get the "Configuration Error" "An error was encountered while configuring your computer for use with this Extender.".

Happens every time the same way. Each failed attempted causes two event log entries below. Interestingly, immediately after the failed attempt - the "Media Center Extender Service" service gets disabled. It is running under the "Local Service" account. I can set it to "automatic start", and then re-start the service, but as soon as I go through the Extender Setup, and it fails, the service is disabled again, with the two event log entries..

I do not have any Media center certificates located under "Certificates (Local Computer)\Personal".

Other relevant info:.

Windows 7 Ultimate 64 bit.
New Xbox 360 Elite (never have had an xbox connected).
Windows firewall disabled on my PC.

I have a Sonic Wall router/hardware firewall. I believe the XBox and the PC see each other..

XBox can "see" the computers on my network (my media center PC and other PC's are listed in XBox when searching network.). When I do the network connectivity test on the XBox, it passes the test to my PC..

Xbox is connected to internet - able to log on to XBox live, and stream from Netflix etc..

In media center on my PC, the Xbox is listed in the Externder section. Shows "Not set up", and shows the setup key, with 3 (same 3) of the 8 digits listed from the Xbox listing.

IP address listed on Xbox settings is the same subnet and gateway as my PC.

However, I cannot ping the Xbox IP address from the PC...times out..

Event Log Errors:.
Event ID: 534.
Media Center Extender Setup failed to configure Terminal Services for Extender..
Error: Access is denied..

Event ID: 533.
Media Center Extender Setup failed to create or retrieve the Windows Media Center Extender PC certificate..
Error: Access is denied..


What can I do to resolve the access denied problems?.

Update:

Logged in to Windows with an account that is an administrator account when trying to configure extender.

Running WMC as administrator

Xbox is connected to the network via network cable (not wireless).

I have disabled the policy setting "Always prompt for password upon connection" in the Computer Configuration\Administrative Templates\Windows Components\Remote Desktop Service\RemoteDesktop Session host\Security hive.

Thanks for replying.

You mean the Software firewal on my windows PC, right? I disabled windows firewall on my PC. Still the same thing.

PC and XBox are running on same subnet.

I get "access denied" in my event log after entering the code. Also, the Extender Service immediately gets disabled.

Any idea what could be causing that? Why is access being denied?

Sonic wall is a hardware firewall/router. Don't believe that is a problem 0 PC and XBox are on the same subnet, and see each other fine.

No Firewall software is running on my PC...same issue.

Why would Media Extender setup fail with "Access Denied", and then disable the Media Center Extender Service?

Again, the 2 event log entries that happen every time the setup fails are:

Media Center Extender Setup failed to configure Terminal Services for Extender.
Error: Access is denied.

and

Media Center Extender Setup failed to create or retrieve the Windows Media Center Extender PC certificate.
Error: Access is denied.

Method 1
Remove the Media Center Extender certificate. To remove the certificate, follow these steps:
Click Start, type mmc in the Start Search box, and then press ENTER.If you are prompted for an administrator password or for confirmation, type the password, or click Continue.
On the File menu, click Add/Remove Snap-in.
Click Certificates, and then click Add.
Select Computer account, and then click Next.
Select Local computer, and then click Finish.
Click OK.
In the Navigation Pane under Console Root, expand Certificates, expand Personal, and then click Certificates.
Right-click Microsoft Windows Media Center Extender Host, and then click Delete.
After you remove the certificate, uninstall the Extender, and then restart the Extender setup.

Method 2
Restart the Network List Service. To do this, follow these steps:
Click Start, type services.msc in the Start Search box, and then press ENTER. If you are prompted for an administrator password or for confirmation, type the password, or click Continue.
In the list of services, verify that Started appears under Status and that Automatic appears under Startup Type for Network List Service.
If you have to modify the settings for the service, double-click the service, make the adjustment, and then click OK.
Restart Extender setup.

kingmalawi's Method 1 worked for me. Thx, Ivan

Coolness! Method 1 worked for me too. Thanks King!

Wow man, you are a LIFESAVER!!!! I have been looking on and off for years trying to get this fixed and your method 1 did the trick!!

Thank you king maliwali method 1 worked, i looked forever befor i found that