Our office has a FE/BE MS Access 2007 Project Tracking database system. Each user has their own copy of the FE database on their C-drive. We are currently going through an upgrade to our operating systems from Windows XP to Windows 7. Whenever a user with a Windows 7 OS opens Project Tracking, no one with a Windows XP OS can open the database without getting the following error message: "Could not use 'Admin'; file already in use". Has anyone else out there experienced this problem? Any help in correcting this issue is greatly appreciated. Thanks.