Not that I think this is related to your specific problem but it is related to getting a “Windows – Delayed Write Failed. Windows was unable to save all the data for the file... bla bla bla.” type error.

On upgrading a client, who uses AVG Internet Security, to OE 8.1B we started getting the above type message during OE Day Ends and this caused some severe problems in the accounting data. After much back and forth I found that the AV Exception List on this workstation (trust it to be the one that does OE Day Ends) did not include the Adagio folders. Once they were added the problem went away.