Is this a legitimate script error or malware?

[Microsoft Windows]

This is on my mom's computer so trying to get help figuring out the problem remotely. She said lately her computer has this message pop up every time she starts her computer, the URL is different in the photo vs. the video she sent me (which I can't seem to attach):"Script Error: An error has occurred in the script on this page.Line: 0CHar: 0Error: Script error.Code: 0URL: https://www.googleoptimize.com/optimize.js?id=GTM-PQGRTLR Do you want to continue running scripts on this page?"The video url is: Nero Software

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