This only happens once in a blue moon. If I hear the glass breakage sound, I know it's happened. One of the network shares has dropped. All the others are okay. There is a buried dialog box stating “The system has detected a possible attempt to compromise security. Please ensure that you can contact the server that authenticated you.” and if I try to open a share from the server, I get the name & password thing to log in. Usually I have up to a dozen programs open, several with files open on the dropped share. If there is an InDesign file open, it will crash InDesign. The server has SQL running on it, and if I'm logged into the databases on the same server with SQL Server Management Studio (Server Authentication) everything is normal - no loss of connection. So the network connection between me and the server appears to be fine. And up to a half-dozen other open shares are fine as this is going on. I went to command prompt, and did NET USE, and the share that has dropped is listed there, and reported as OK. Other details. I'm using Windows 7 Pro 64bit. We have a win2k Domain here. The problem server is Server 2003. Never had this happen on another server as far as I know. I checked the event logs for my machine, the server, and our domain controllers, and didn't see any events around the time of network loss (Other than the InDesign app crashing). I'm pretty sure this has only happened when I've had Dreamweaver open at the time, but I'm not sure about that. Nobody else on our network has reported this, but I'm a unique user -- I use that server the most, and I'm one of the few Windows 7 users (although it may be possible that I saw the same problem working in Windows XP last year and I never figured out what was going on.) This last time it happened, I'd been logged into the share from Monday morning to Wednesday mid-day. (I usually stay logged into this share continuously for weeks at a time) If I log out, then log back in, all is fine.

Hi, As you said, this issue only occurs in your Windows 7 and a unique windows server 2003. Do the Windows server 2003 and the Windows 7client belongs to a same domain? If not, this error message could be due to the network firewall filters Kerberos traffic settings: You receive a "The system has detected a possible attempt to compromise security" error message when you try to include security settings for a user from different domain in a local domain folder Due to this issue only occur in Windows server 2003, I also suspect it is related to Windows server 2003 settings. You could try the following steps to check it: 1. It is recommended to backup system state before applying any major changes: 2. Open registry editor, browse to HKLM\System\CurrentControlSet\Control\Lsa\MSV1_0. Locate the following values: NTLMMINCLIENTSEC NTLMMINSERVERSEC 3. Change the values of the above 2 values to 0x0. Hope it helps. Alex ZhaoPlease 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.