Developers of the Comodo Antivirus utility are advising users to ensure they update before attempting to upgrade to the Windows 10 Creators Update, version 1703. Comodo say's users running the latest version of Windows 10 can experience severe graphical issues if used with product versions older than those listed above. More details below:
Some users have reported issues with font rendering problems in applications and even the command prompt. Users who didn't apply the update but already installed the Creators Update, should remove the software or install the latest version. One of the important steps we recommend in our 12 step prep guide for the Windows 10 Creators Update is removing the Antivirus utility completely before upgrading.