One of my user brand new laptop running windows 7 64bits is showing the below error. the M drive is a network mapped drive. what could be the reason for the error message ? the first time he encounter this error was when he was in a meeting, and the laptop went into sleep mode during this time.

It says the L drive is not accessible, not the M drive. Is the L drive also a network drive? Quite simply, this message means that your computer cannot connect to the drive. There could be a lot of reasons for this. Does it connect fine after restart? Was it just a once off error? If he is in a meeting room or a separate room to the one he is usually in, are you sure he has a network connection in there, and is connected in the same way to the same network? For assistance, will need more information about the specifics.

only this user is getting is error once in a while. could it be due to his network driver or NIC ?

Hi, 1. Is your computer able to access other network shares? 2. Perform a system restore to check the result. 3. Temporarily disable the security software and firewall. Also, test the issue with other computers in the same environment.Tracy Cai TechNet Community Support