Let Windows XP SP3 also support network-level authentication.

SP3 One thing is that Remote Desktop is updated to V6.1. Check out the related webpages and learn that Remote Desktop with 6.0 or higher supports NLA (Network Level Authentication). NLA says it's the way to authenticate before you go to the remote desktop, instead of authenticating it when you log in. By default, Vista is "only allowed to run remote computer connections with network authentication." Ever since, I have failed with SP3 and Vista.

The online solution is to set the remote desktop connection mode of vista to "Allow any version of Remote Desktop Connection". This downgrade to adapt to XP, I thought it was a retrogression, otherwise upgrading XP remote desktop to 6.1 does not make any sense. Therefore, in the partner newsgroup, I asked Microsoft engineers:

The initial answer from Microsoft engineers was that XP does not support NLA. I later corrected that SP3 supports NLA and told me to follow the following methods to make XP support NLA. He gave me a KB: http://support.microsoft.com/kb/951608/

The NLA operation is:

1. Click Start, click Run, type regedit And press ENTER.

2. In navigation pane,locate and then click the following registry subkey:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlLsa

3. In the details pane, right-click SecurityProviders, and then click Modify. .

4. In the Value data box, type tspkg. Leave any data specific to other SSPs, and then click OK.

5. In navigation pane,locate and then click the following registry subkey:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSecurityProviders

6. in details pane, right-click SecurityProviders, and then click Modify .

7. In the Value data box, type credssp.dll. Leave any data specific to other SSPs, and then click OK.

8. exit Registry Editor.

9. Please restart your computer. .