Windows 7 connection problems in BSNL Broadband in windows 7 in India

Solution 1: Update Network Adapter Drivers​

1. Press Windows Key + X and select Device Manager.
2. Locate the network adapter (usually under Network Adapters) used for your BSNL connection.
3. Right-click on the network adapter and select Update driver.
4. Follow the on-screen instructions to update the driver.

   Solution 2: Reset TCP/IP​

5. Open Command Prompt as an administrator.
6. Type the following commands one by one and press Enter after each:
   Code:

    netsh int ip reset netsh interface ipv4 reset netsh interface ipv6 reset netsh winsock reset

7. Restart your computer.

   Solution 3: Disable IPv6​

8. Go to Network and Sharing Center.
9. Click on your network connection.
10. Click Properties.
11. Uncheck the box next to Internet Protocol Version 6 (TCP/IPv6).
12. Click OK to save the changes.

    Solution 4: Disable Auto-Tuning​

13. Open Command Prompt as an administrator.
14. Enter the following command and press Enter:
    Code:

     netsh interface tcp set global autotuninglevel=disabled

15. Restart your computer.

    Solution 5: Disable IPv6 in Windows Registry​

16. Press Windows Key + R, type regedit, and hit Enter.
17. Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TCPIP6\Parameters.
18. Create a DWORD (32-bit) called DisabledComponents if it doesn't exist.
19. Set its value to ffffffff (8 f's).
20. Restart your computer. After trying these solutions, see if the Error 651 issue is resolved. If the issue persists, please let me know for further assistance.