Windows 7 Help , new Win7 system will not work on the network correctly.... details in post!!

Network Connectivity Issue Analysis:​

1. Password Authentication Problem:
   • You mentioned that when trying to connect to the new Windows 7 system from other devices, they are prompted for a password, but none of the credentials work. This suggests an authentication issue between the systems.
   • You tried guest accounts and no passwords, but the problem persists.
   []Folder Permissions vs. Computer Settings:
   • You clarified that the issue doesn't seem to be with folder permissions, but rather with the computer itself. Even browsing the new Windows 7 system on the network is problematic.

     Solutions to Consider:​

   []Check Network Discovery and Sharing Settings:
   • Confirm that network discovery is enabled on the Windows 7 system. Navigate to "Control Panel" > "Network and Sharing Center" > "Change advanced sharing settings" to ensure network discovery is turned on.
   []Workgroup and Sharing Configuration:
   • Verify that both systems are part of the same workgroup. This setting must be the same for seamless communication within the network.
   []Password-Protected Sharing:
   • Check if password-protected sharing is enabled on the Windows 7 system. You may need to turn this off to allow seamless access from other devices without entering credentials each time.
   []LAN Manager Authentication Level:
   • Regarding the LAN Manager authentication level difference you found, where one system had it set to "undefined" and the other to "Send LM & NTLM response," you can modify this through the Registry Editor.

     Adjusting LAN Manager Authentication Level in Registry Editor:​

   []Press Win + R, type regedit, and hit Enter. []Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa. []Look for the key LmCompatibilityLevel on the right pane. []Modify the value data to 1 for "Send LM & NTLM responses" or 0 for "Send LM & NTLM - use NTLMv2 session security if negotiated." []If the key is missing, create a new REG_DWORD entry with the name LmCompatibilityLevel.

   Important Note:​

   • Be cautious when editing the Registry: Making incorrect changes can impact system stability. Always back up the registry before making any modifications.
   • After adjusting the LAN Manager authentication level, reboot your system to apply the changes.
   Try adjusting the LAN Manager authentication level as mentioned above and ensure your network and sharing settings align with the recommendations. If the issue persists, further troubleshooting may be necessary. Let me know if you need assistance with any specific steps or encounter any difficulties during the process.