Illustrator v25.4.1 displaying Underlying Code on Home Screen UI after updating on Windows 10

Hi there,

Sorry about the trouble you are facing. Could you please share a few more details like:

• Are there any recent changes made to your system? For example, any antivirus, system updates, or web extensions installed recently.
• Does resetting Illustrator Preferences ( https://helpx.adobe.com/illustrator/using/setting-preferences.html) help to resolve the issue?
  Disclaimer: Please note that resetting preferences will remove all the custom settings, and Illustrator will launch with default settings. You can also take a backup of the folders in case you want to. Location is mentioned in the article.

Also, in addition to the suggestion given above by @lambiloon, you may try the following steps one by one and let us know how it goes:

• Rename the CEP folder to CEP.old from the following location:
  C:\Program Files (x86)\Common Files\Adobe
• If that doesn't help, rename the extensions folder to extensions.old in the following location:
  C:\Program Files\Common Files\Adobe\UXP
• If that doesn't help either, uninstall the application using the CC Cleaner tool and reinstall from the Creative Cloud Desktop app.

Thanks & Regards,

Anshul Saini

Hi try legacy file system in preferences may be it can help you or just use adobe clean remove tool to uninstall it or reveret back to last working version...regards