How to remove allowlucks.com?

My nephew was using my computer during his 1 week visit.
Now I have this disturbing pop up from Notification Area generated by allowlucks.com.
Someone please show me how to eradicate this one.
I went to Programs and Features. Not there.
I have gone to Regedit hoping I can find it. Not there.
I went to Programs Files from C drive. Not there.

P.S. I do not have McAfee installed. I have been using Windows Defender exclusively for at least 3 years.
One of the most annoying popups......

Thank you for the response.
To answer your top 2 questions:
1.) I use Windows Defender ONLY. No other AVs installed.
2.) Temp files have been removed using Internet Options. No effect. Still get the popups.

I'll try the Everything tool you suggested in a minute.

Everything search tool does not find allowlucks.com.

Back to square one.

Try3 said:

David,

Getting those notifications implies that there is an uninvited process running on your computer.

As Paul asked, have you run a full & an offline Windows Defender scan?
How to Scan with Windows Defender - TenForumsTutorials
Windows Defender Offline Scan - TenForumsTutorials

Denis

I did a quick scan earlier.
I am now doing a Full Scan with Windows Defender in Windows Security.

Callender said:

I don't use edge but try launching edge then press [Ctrl+Shift+Del]

Clear everything.

Also remove notifications for that website:

Add or Remove Sites for Microsoft Edge Web Notifications in Windows 10

Thank you.
I am still waiting for Windows Defender full scan to finish.
If problem still persists, I'll try your "Add or Remove Sites....." tutorial.

Question to all.....
I always have an Image Backup done each time a new Update installed.
I have one done for 20H2 build 19042.804. That's before this issue arises.
If I run that, will it remove the "uninvited guest"?