Time Provider NtpClient: The response received from domain controller %1 is missing the signature. The response may have been tampered with and will be ignored.

Your computer should be a member of a domain, and any responses from the domain controller should be signed (authenticated) by the domain controller. This event can indicate a security situation or that your computer is part of a domain and your account was deleted.

The cause might be one of the following:

• A domain controller has been configured as a manual time source.
• The computer is synchronizing with both a manual time source and a domain time source (type=AllSync) where one or more domain controllers in the domain is configured as the manual time source.

Do one or all of the following:

• Verify with an Administrator that this computer account is valid in Active Directory.
• Verify that no domain controllers are present in the manual time source list.
• Configure an alternative manual time source. If your computer is part of a domain, then it should get its time source from the domain controller. The configuration can be modified by using the w32tm command line tool and manipulating the syncfromflags option.