Event ID 61 — AD CS Program Resource Availability

Updated: November 27, 2007

Applies To: Windows Server 2008

Certification authorities (CAs) need adequate system resources and operating system components to function. If a server has insufficient memory or hard disk space, or if operating system components become unavailable, attempts to start Active Directory Certificate Services (AD CS) can fail.

Event Details

Product: Windows Operating System
ID: 61
Source: Microsoft-Windows-CertificationAuthority
Version: 6.0
Message: Active Directory Certificate Services refused to start because a safe mode startup was detected.


Start Windows in normal mode to enable AD CS

Active Directory Certificate Services (AD CS) cannot be installed when the computer has been started with the Safe Mode or Safe Mode with Networking startup options.

To resolve this issue:

  • Restart the computer, and select the Start Windows Normally startup option.


To perform this procedure, you must have membership in local Administrators on the computer hosting the certification authority (CA), or you must have been delegated the appropriate authority.

To confirm that the CA service is available:

  1. On the computer hosting the CA, click Start, type cmd and press ENTER.

  2. Type certutil -config <CAconfig> -ping and press ENTER.

    CAconfig is the CA configuration string, in the form CAhostname\CAname.

AD CS Program Resource Availability

Active Directory Certificate Services