I run a small business network with 7 users. Four of them are now on Windows 7 64-bit, the others are on Windows XP 32-bit. Server is Windows 2003 with a Drobo S attached as a USB storage device One user is reporting that random files are being locked (usually .xls or .pdf) by other users (generally XP users) or their own computer. The closest useful report came as the files are in use by "windows explorer" Problem seems to have appeared after we installed the Drobo

Hi, From your description, I notice the issue occurred on Windows XP users. What about Windows 7 computer? What error is received from Windows Explorer? If any Security Software or firewall is running, temporary disable them. Regarding the Windows XP issue, please contact Windows XP Forum: http://social.technet.microsoft.com/Forums/en-us/itproxpsp/threads Regards, NikiPlease remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.