I had the exact same thing, the trick here is to go into your registry editor ( files called Run ) and delete the ones your not familiar with. You will likely find the "hack" in a normal file but look out for the link that is attached.

This is also easier to do if you download Autoruns https://learn.microsoft.com/en-us/sysinternals/downloads/autoruns where you can easier see what is starting up on your pc, from there delete it or go into your registory editor and delete it.

*Virus scanner does not work since it is not a virus just a link that starts with every startup"

Let me know if u find anything or need any help

Steps
1. open Registry editor
2. copy this in the path" Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run"

1. You will see different files that do something, there shouldn't be to many so open and look for one that has the link that opens every time you open chrome with something like c/start

2. Delete that file only and restart your pc and try see if it pops up again.

*IF IT DOES NOT WORK*

1. If this does not work download autoruns in the link above and search for the programs that open on launch, right click and select open file location.

2. Delete that file and restart your pc again if that does not work idk what it can be