Basic Troubleshooting

alf_data 

If after starting Alfresco, you are unable to login, you may have started Alfresco from a different directory.

Edit the <extension>\custom-data-location.properties.sample by removing the .sample and setting the dir.root to the full path that leads to your alf_data file (for example dir.root=C:/alfresco-1.3/alf_data). You will also need to remove the .sample from the custom-db-and-data-context.xml, custom-db-connection.properties and custom-hibernate-dialect.properties in the same folder. This will ensure that your dir.root and dir.contentstore values are always correct, regardless of where Alfresco is started.

CIFS

Run "nbtstat -n". Do you see <your server name>_A? 

Log Files

You will find the alfresco.log in the directory where you started Alfresco. If you installed Alfresco as a service, this will be in "c:\windows\system32"

To enable specific logging, edit the log4j.properties file.