The Microsoft Clustering Service encountered a fatal error. The vital quorum log file 'Q:\MSCS\quolog.log' could not be found. If you have a backup of the quorum log file, you may try to start the cluster service by entering 'clussvc -debug -noquorumlogging' at a command window, copy the backed up quorum log file to the MSCS directory in the quorum drive, stop the cluster service, and restart the cluster service normally using the 'net start clussvc' command. If you do not have a backup of the quorum log file, you may try to start the cluster service as 'clussvc -debug -resetquorumlog' and this will attempt to create a new quorum log file based on possibly stale information in the cluster hive. You may then stop the cluster service and restart it normally using the 'net start clussvc' command.