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If you are Unable to access NAS devices from Vista operating system via local area network.

Follow the below mentioned steps on the computer which you are unable to access

When accessing a file share on a remote computer or device, Windows Vista will refuse to send your password using older encryption methods.

Unfortunately, many NAS devices as well as older versions of Linux do not understand the newer encryption methods. This keeps you from being able to access these devices.

One solution is to force Windows Vista to use the older encryption methods. To do that, follow these steps:

For the above changes to be made in for Windows Vista Home Basic, Home Premium

CAUTION: Improperly modifying the registry can harm your system.

1.     Start > Run > regedit

2.     In the left pane, expand these folders: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\

3.     In the left pane, click on the folder named: Lsa

4.     In the right pane, double-click “LmCompatibilityLevel”

5.     Type the number 1 and press enter

6.     Restart the computer

Users of Windows Vista Business, Enterprise, and Ultimate

Start > Run> secpol.msc

Local policies-Security Options

Network Security - LAN manager authentication level

      Change it to Send LM & NTLM - use NTLMv2 session security if negotiated

Note: This is not a recommended solution. Some manufacturers have started offering firmware upgrades for their NAS devices that make them compatible with the Default security settings in Windows Vista.

Giloo