See here:
https://www.online-tech-tips.com/computer-tips/sonic-update-manager/
As Sonic Update Manager is a feature of Sonic RecordNow, which will have been installed on your computer to enable you to use its CD/DVD writer, that link suggests that it might be best not to remove Sonic RecordNow, as you'd lose the ability to write discs. If I had the problem though, I'd simply get rid of Sonic RecordNow and replace it with this
https://www.ashampoo.com/uk/gbp/pqu/7110/burning-software/burning-studio-free
(which is probably better anyway).