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Did this pop up on your computer or it left a voice message on your phone?
Do not call that 800 number. It is a scam. But you do not need to go through your updates and see if it updated something suspicious. I would run a complete scan with your anti virus.
Read this webpage: https://ugetfix.com/ask/how-to-fix-error-268d3/
I will have them to issue a refund.