If you receive:

Source: CertSvc                              Event ID: 17                              Description: "The Certificate Server did not start: Unable to initialize                                            the database connection for CA COMPUTERNAME.                                            The error code is 0xffffffff."
the CertSrv ODBC data source has not been created.

If you are running an unattented setup, let it complete.

To create the data source, run regedit /s <Drive:>\folder\certsrv.reg where certsrv.reg contains the following:

REGEDIT4                               \[HKEY_LOCAL_MACHINE\SOFTWARE\ODBC\odbc.ini\CertSrv\]                              "Driver"="C:\\WINNT\\System32\\odbcjt32.dll"                              "DBQ"="C:\\WINNT\\System32\\CertLog\\certsrv.mdb"                              "DriverId"=dword:00000019                              "SafeTransactions"=dword:00000000                              "UID"="Admin"                              \[HKEY_LOCAL_MACHINE\SOFTWARE\ODBC\odbc.ini\CertSrv\Engines\Jet\]                              "ImplicitCommitSync"="Yes"                              "Threads"=dword:00000003                              "UserCommitSync"="Yes"                               \[HKEY_LOCAL_MACHINE\SOFTWARE\ODBC\odbc.ini\ODBC Data Sources\]                              "CertSrv"="Microsoft Access Driver (*.mdb)" 
NOTE: You must alter the Driver and DBQ paths for your installation.