Problem in network Windows 11 24h2

I never had to do any of that. Just enable guest login and bingo! everything works.

Does the problem still exist after you disable IPv6 on your computer's network adapter, enable DHCP, and restart your computer?

I use static IP but having the same problem.

Following the Windows 11 24H2 update, users are frequently reporting issues accessing network drives or experiencing LAN manager problems, often due to stricter security settings that now enforce SMB signing by default, potentially blocking connections to older devices or network shares that don't support this feature; this can manifest as inability to access network drives, connection timeouts, or error messages related to SMB authentication.  Key points about LAN manager issues with Windows 11 24H2:

• Stricter SMB security: The update has tightened security by enabling SMB signing by default, which can cause problems with older devices or network shares that don't support this feature.
• Guest access restrictions: The update may also restrict guest access on network shares, further impacting connectivity.

Potential solutions:

• Check network settings: Verify your network settings including IP address, subnet mask, and DNS servers on both the client and server.
• Adjust SMB settings:
  • Enable guest access: Depending on your network environment, you may need to enable "Allow insecure guest logons" in the Local Group Policy Editor to allow older devices to access network shares.
• Disable SMB signing: If absolutely necessary, consider temporarily disabling SMB signing on your network, but be aware this can compromise security.

Following the Windows 11 24H2 update, users are frequently reporting issues accessing network drives or experiencing LAN manager problems, often due to stricter security settings that now enforce SMB signing by default, potentially blocking connections to older devices or network shares that don't support this feature; this can manifest as inability to access network drives, connection timeouts, or error messages related to SMB authentication.  Key points about LAN manager issues with Windows 11 24H2:

• Stricter SMB security: The update has tightened security by enabling SMB signing by default, which can cause problems with older devices or network shares that don't support this feature.
• Guest access restrictions: The update may also restrict guest access on network shares, further impacting connectivity.

Potential solutions:

• Check network settings: Verify your network settings including IP address, subnet mask, and DNS servers on both the client and server.
• Adjust SMB settings:
  • Enable guest access: Depending on your network environment, you may need to enable "Allow insecure guest logons" in the Local Group Policy Editor to allow older devices to access network shares.
• Disable SMB signing: If absolutely necessary, consider temporarily disabling SMB signing on your network, but be aware this can compromise security.