Some of the checks that one needs to make for solving the login problems in Norton are:

One should replace their Norton antivirus on a regular basis and make sure that he/she is using the latest version of the antivirus.

One should keep their web browser up to date.

One should keep their operating system updated.

Clearing the caches and cookies is also very important.

One should complete the scanning.

At times, the login issues occur when the product key has been wrongly activated. In such circumstance one should perform the following measures:

First and foremost, one needs to add the Norton renew subscription to their Norton login Account.

Then go to the Norton Account and type in the 25 digits numerical key in the given field.

The user will then have complete access to the features of Norton after the activation of the product.

Poor connectivity of the internet can also be a cause for login issues. So in such cases, one can take the following measures:

Reconnect your source of the internet after disconnecting it first.

One can also choose to switch to any other reliable and alternative source for their internet connection.

Try restarting the device.

Try to get your router restarted.

One can also try to recover the password of their Norton Antivirus Account for troubleshooting the login issues by using the following methods:

Go to the login page of Norton.com/setup.

Choose the option HAVING TROUBLE IN SIGNING IN?

One then needs to link retrieve password and username.

Fill in your email ID and then select Continue.

Norton will then send a link to your mail. Open that mail and then open that link that was sent to you there.

You can then go on to following the instructions on-screen for recovering the username or password of Norton.

Sometimes the Norton issue occurs due to error codes.

 For solving Norton error code 3035:

The registry entries linked with the error 8504 needs to be repaired first.

You then need to do the scanning of your device for any viruses, threats and malware.

Then all the junk files present on the device need to be cleaned.

Then get all your Device drivers updated.

For solving Norton antivirus error code 9:

Make a clean installation of the MS Windows Operating system.

Reinstall your Norton account after uninstalling it.

All the junk files should be eliminated.

Execute a full scanning for cleaning up all of the viruses and malware.

Then go on to fixing the registry entries which are associated with the Norton antivirus error code 9.

For Solving the error codes 3035 in Norton 6559:

Get the device drivers for your PC updated.

Re-install after uninstalling the Norton antivirus.

All the junk files present on your device should be eliminated.

Run a full scan for cleaning up all the virus and malware.

Make a clean installation of your Operating system - MS Windows.

Uninstall and then reinstall the programs that are associated with the Norton error codes 6559,3039.