Issue:

Open Admin&Monitor Console and receive this error message:

A runtime error occurred login failed for user 'domainname\machinename$'

Reason:

This error occurs possibly due to domain name change or changes to the new SQL server that has a different SQL instance name and computer name

Solution:

Create this 'domainname\machinename$' account in the DB and give permission to the ABBYY user. Then add this account to the ABBYY database and grant permissions.