Event ID - 100

Event Id100
SourceCertSvc
DescriptionCertificate Services did not start: Could not load or verify the current CA certificate. Enterprise-Sub The revocation function was unable to check revocation because the revocation server was offline.
Event InformationWhen you restart your computer after you upgrade to Windows 2000 Service Pack 4 (SP4), the Certificate Services service (CertSvc) does not start.
CAUSE: This issue occurs because a valid Certificate Revocation List (CRL) for one or more of the intermediate certification authority (CA) certificates could not be found. This issue may occur if the CRL is not available to the certificate server, or if the CRL has expired.
Reference LinksCertificate Services Does Not Start After You Upgrade to Windows 2000 Service Pack 4

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