No Internet After Installing Norton product

No Internet Connection after Installing Norton Product

1. Create System Restore
2. Back-up Registry
3. Removed Norton Product using Add/Remove Programs.
4. Run Norton's NRT application
5. Remove all Norton Entries from the Registry
6. Remove all other Security Software entries from the Registry

    To open Registry
    - Open Run dialogue box
           - Win+R
    - Type "regedit" (without quotes) + Enter
    - Press Ctrl + F then enter the name of the security software you are looking for then delete.
7. Flush DNS and Release Renew Ip
   Open Command Prompt
   - at Run dialogue, type cmd or Command + Enter
   - at cmd window, type in ipconfig /flushDNS then press Enter
   - type in ipconfig /release then Enter
   - type in ipconfig /renew then Enter
8. Check the network connection
    - Make sure it is automatic
9. Restart PC
10.  Internet Connection should be back

Other Solutions to try
- If Norton is still installed, you can try disabling the Smart Firewall from the Norton Interface then check the connection

Flushing DNs and Resetting the Winsock

1. Click Start > Run, type  ipconfig /flushdns and click OK.

2. Click Start > Run, type  cmd and click OK.

3. in the command prompt, type the following and press Enter after each line:

netsh int ip reset resetlog.txt [Enter]
netsh winsock reset [Enter]

exit [Enter]

You can also:

 Locate & delete SMR300.sys under C:\Windows\System32\drivers.
- Uninstall SMR utility 3.1 from device manager
- Restart the computer.
- Create new windows user account.
- Turn off the User Account Control.
- Install Norton Internet Security on the new user account.
- Restarted the computer,  Log in to customer's user account.
- Activate the product.
- Ran the live update and quick scan.
- Deleted the user account which we created.

Then try to look for this in the Registry:

This can happen if the uninstall process fails and leaves behind a Symantec registry value. Do the following to fix the problem: 
WARNING: We strongly recommend that you back up the registry before you make any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify only the keys that are specified. Read the document How to back up the Windows registry for instructions. 

1. Click Start > Run. The Run dialog box appears. 
2. Type regedit and then click OK. The Registry Editor opens. 
3. Navigate to and select the following key: 

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\DHCP 
4. Double-click the DependOnService value in the right window. 
5. Delete the SYMTDI entry from the list of items. 
6. Click OK. 
7. Click Registry, and then click Exit. 
8. Restart the computer.