Hi BronwynBolt,
Open that Startup tab on Task Manager again, and disable the two items shown below, I believe the error is caused by the Seagate Toolkit app, though it may be caused by the Canon Quick Utility Toolbox.
Then restart your PC again, and check if the error is gone.
Then, enable one of those again and restart, that way you will find which one is causing the error.
Then uninstall the app that is causing the error and if you want to continue using that app, go to their website to download and re-install the latest version they provide.
.