We recently update our NOD32 Antivirus from version 3 to version 4. Since then any time we try to open an MS Access database on our file server it seems to lock up the file server completely. It doesn't matter if it is an application which access a database, or if we try to directly open an .mdb file. The problem ONLY happens on computers running version 4, and goes away the minute we uninstall it. Version 3 does not have this problem. What could be causing this to happen?