Windows XP tries to sign or seal the secure channel between the workstation and the domain controller. This causes the following error:
Windows cannot connect to the domain either because the domain controller is down or otherwise unavailable or because your computer account was not found.
The domain controller may record:
Event ID: 5723
The session setup from the computer <Computername> failed to authenticate. The name of the account referenced in the security database is <Computername>. The following error occurred: Access is denied.
The client may record:
Event Source: NETLOGON
Event ID: 3227
Description: The session setup to the Windows NT or Windows 2000 domain controller \\<ServerName> for the domain <DomainName> failed because \\<ServerName> does not support signing or sealing the Netlogon session. Either upgrade the domain controller or set the RequireSignOrSeal registry entry on this machine to 0.
To workaround this feature difference:
1. Use Control Panel to open Local Security Policy in the Administrative Tools.
2. Navigate to Local Policies / Security Options.
3. Double-click Domain Member:Digitally encrypt or sign secure channel data (always).
4. Press Disabled.
5. Press Apply and OK.
NOTE: You could Merge the following requiresignorseal.reg file: