After installing any of OCS 2007 R2 Cumulative updates the front end service does not start up throwing the below error
This happens if you don’t install the DB2009-update.msi before running the updates.
So what you need to do is grab the update from here
Then install it by opening up CMD and type DB2009-update.msi poolname=”your ocs pool”
Your OCS poolname doesn’t need to be FQDN
After applying the DB update, your service will start again