TM keeps "losing" data

I am running TM on a Mac via Parellels w/Windows XP SP3 installed on that drive.

Every now and then, when I launch TM, I get a message saying that my password is incorrect.    I've called TM and they will have me reset my preferences and everything is okay, but I have to recreate personalized settings such as leadership positions and calendar setups.

Or, I can restore the datbase from the .bak file.

I am using Kapersky AV and have turned off (I think) everything related to TM so it won't see it, but tech support thinks my AV still might be corrupting files.

Any suggestions?

Thanks,
Leslie Knowles
T170 Committee Secretary
Little Rock Air Force Base