I have been getting the same warning since the 1st week of March. I thought I had done something when I added a new client. I ended up deleting the client and starting over. Apparently that was not the case. I have had several updates since the first time it appeared and it is still occurring.
UPDATE: Lacerte is aware of the issue and hopefully will be correcting the issue soon. I'm pretty sure it's related to some recent Windows updates.
I have a least one user that is getting this message constantly. I'm going to contact tech support but it sounds like it might not be worth it. I'm hoping the next updates addresses this issue. If anyone comes up with a solution, please share.