Common Internet File System (CIFS) – Login Using Anonymous (Guest) Account to Network Shares & NAS Systems
Windows 7:
To map and connect to a network share that is using the SMB1 protocol in Windows, there are a few things that you need to do depending on which version of Windows you use. In Windows 7, it should be pretty easy. When mapping the network drive, be sure to check the "Connect using different credentials" box. For the login, use "anonymous". Leave the password field blank (don't provide a password).
Windows 10:
Windows 10 doesn't support the SMB1 protocol by default. However, it can be enabled. To enable SMB1 support, go to the Control Panel, click on "Programs and Features", and then click on the "Turn Windows features on or off" link in the left sidebar. Under the "SMB 1.0" category, enable the "SMB 1.0/CIFS Client" by clicking the checkbox and making sure it's in a checked state. Uncheck the "SMB 1.0/CIFS Automatic Removal" entry if it's enabled as it will cause anonymous logins to SMB1.0 shares to fail.
The next step is to configure Windows 10 to allow anonymous logins to network shares.
To enable access under the guest account from your computer, you need to use the Group Policy Editor (gpedit.msc). Go to the section: Computer Configuration -> Administrative templates -> Network -> Lanman Workstation. Find and enable the policy "Enable insecure guest logons". These policy settings determine whether the SMB client will allow the guest logon to the SMB server.
More Detailed Guide | Archived Copy
Windows 7 and 10:
If you get a message that a drive is already mapped using different credentials, simply map the connection using its IP address instead rather than its name.