<p><a href="http://wincert.net/wp-content/uploads/2015/01/networking2.jpg"><img class="alignnone size-full wp-image-563" src="http://wincert.net/wp-content/uploads/2015/01/networking2.jpg" alt="networking box" width="720" height="340" /></a></p>
<p>I had issues with mapped drives on Windows 2003 server from Windows 7 workstation.</p>
<p>Drives are still visible in windows explorer, but an icon has red X over it. Once you try to double click the drive, the following error occurs:</p>
<p>&#8220;Error occured while connecting to \\server\drive, Microsoft Windows Network: The local device name is already in use.&#8221;</p>
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<p>To restore the connection, I had to reboot the PC. Nothing else worked, like trying do disconnect the drive and map it again, or even a logoff.</p>
<p>To resolve this issue do the following on your Windows 7 machine:</p>
<p>&#8211; Open Control Panel | Administrative Tools | Local Security Policy ( or hit Win orb and type <strong>&#8216;secpol.msc&#8217;</strong>)<br />
&#8211; In the left pane, expand Local Policies | Security Options<br />
&#8211; In the right pane locate and open &#8220;<strong>Network security: LAN manager authentication level</strong>&#8221;<br />
&#8211; In the drop-down box select &#8220;<strong>Send LM &; NTLM responses</strong>&#8220;.<br />
&#8211; Click Ok</p>
<p>Problem should be resolved now.</p>