The issue you're experiencing certainly sounds unusual, and could potentially be connected to several factors. I'll provide some suggestions and steps as a starting point for troubleshooting.
- Abrupt Synchronization: If you've enabled bookmark syncing on Chrome and Edge, there's a possibility they could have suddenly synced with one of your logged-in accounts on a different device. This synchronization could be a result of having set up Norton's Ultimate Utilities or any installation/update process. You can isolate the issue by checking your Google Account or Microsoft account from different devices to see if the bookmarks are showing up there too.
- Possible Infection: While Norton's Ultimate Utilities is generally...