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In Windows 7, open Local Security Policy with elevated administrator privilege. Under Local Policies, goto Security Options and look for &quot;Network security: LAN Manager authentication level&quot; and change the Security Setting to &quot;Send LM &amp;&nbsp;NTLM responses&quot;. 
 
Description of this local policy is as follows:- 
 
Network security: LAN Manager authentication level 
 
This security setting determines which challenge/response authentication protocol is used for network logons. This choice affects the level of authentication protocol used by clients, the level of session security negotiated, and the level of authentication accepted by servers as follows: 
 
Send LM &amp;&nbsp;NTLM responses: Clients use LM and NTLM authentication and never use NTLMv2 session security; domain controllers accept LM, NTLM, and NTLMv2 authentication. 
 
Send LM &amp;&nbsp;NTLM - use NTLMv2 session security if negotiated: Clients use LM and NTLM authentication and use NTLMv2 session security if the server supports it; domain controllers accept LM, NTLM, and NTLMv2 authentication. 
 
Send NTLM response only: Clients use NTLM authentication only and use NTLMv2 session security if the server supports it; domain controllers accept LM, NTLM, and NTLMv2 authentication. 
 
Send NTLMv2 response only: Clients use NTLMv2 authentication only and use NTLMv2 session security if the server supports it; domain controllers accept LM, NTLM, and NTLMv2 authentication. 
 
Send NTLMv2 response only\refuse LM: Clients use NTLMv2 authentication only and use NTLMv2 session security if the server supports it; domain controllers refuse LM (accept only NTLM and NTLMv2 authentication). 
 
Send NTLMv2 response only\refuse LM &amp;&nbsp;NTLM: Clients use NTLMv2 authentication only and use NTLMv2 session security if the server supports it; domain controllers refuse LM and NTLM (accept only NTLMv2 authentication). 
 
Important 
 
This setting can affect the ability of computers running Windows 2000 Server, Windows 2000 Professional, Windows XP Professional, and the Windows Server 2003 family to communicate with computers running Windows NT 4.0 and earlier over the network. For example, at the time of this writing, computers running Windows NT 4.0 SP4 and earlier did not support NTLMv2. Computers running Windows 95 and Windows 98 did not support NTLM. 
 
Default: 
 
Windows 2000 and windows XP: send LM &amp;&nbsp;NTLM responses 
 
Windows Server 2003: Send NTLM response only 
 
Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2: Send NTLMv2 response only 
 
If your system is Windows 7 Home Premium, you may change it from Registry. 
 
1. Launch regedit from Start Search box. 
2. Find the following branch. 
&nbsp; 
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa 
 
3. Create a DWORD key under Lsa and set: 
 
Name: LmCompatibilityLevel 
Value: 1 
 
4. Restart.&quot; 
 
Source: <a href="http://social.technet.microsoft.com/Forums/en/w7itpronetworking/thread/91fe4e10-a0d4-45db-94df-fad885d8f64f" rel="ugc nofollow">http://social.technet.microsoft.com/Forums/en/w7itpronetworking/thread/91fe4e10-a0d4-45db-94df-fad885d8f64f</a> 
 
Source: <a href="https://www.experts-exchange.com/questions/27027872/wombat2-d-drive-is-not-accessible-You-might-not-have-permission-to-use-this-network-resource.html" rel="ugc">https://www.experts-exchange.com/questions/27027872/wombat2-d-drive-is-not-accessible-You-might-not-have-permission-to-use-this-network-resource.html</a> 
 
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <a href="https://www.experts-exchange.com/questions/26955355/cannot-connect-to-windows-2000-share-from-windows-7-home-premium.html" rel="ugc">https://www.experts-exchange.com/questions/26955355/cannot-connect-to-windows-2000-share-from-windows-7-home-premium.html</a>
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Windows 7 system not able to logon to Windows 2000 server. 
System “sees” the server on the network but it will not connect w/ any user name/password.
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Windows 7 system not able to logon to Windows 2000 server.
System “sees” the server on the network but it will not connect w/ any user name/password.

Windows 7 system not able to logon to Windows 2000 server.

Windows 7 is an operating system from Microsoft. Features include multi-touch support, a redesigned Windows Shell with a new taskbar, referred to as the Superbar, a home networking system called HomeGroup, and performance improvements.

Windows 7

Windows 2000 is an operating system for use on both client and server computers. It is the successor to Windows NT 4.0, and is the last version of Microsoft Windows to display the "Windows NT" designation. Four editions of Windows 2000 were released (Professional, Server, Advanced Server, and Datacenter Server) that shared a core set of features, including many system utilities such as the Microsoft Management Console. All versions of the operating system support NTFS 3.0, Encrypting File System, as well as basic and dynamic disk storage. The Windows 2000 Server family includes support for Active Directory services, Distributed File System and fault-redundant storage volumes.