We have been having a similar problem for a couple of years now. Files suddenly and randomly get corrupted or even on occasion disappear. Once this happens we cant get into them and sometimes Lacerte completely stops working for everyone on the network. This has been utterly frustrating - no solid help from Lacerte - our IT people keep doing the miraculous but still, files keep auto-corrupting. Sometimes shuts down the whole office and we have to reschedule clients and do damage control. All of our equipment is pretty new and Lacerte is the only issue. We can't go on running a business like this though...and for $15-20k a year it just keeps feeling better and better...