I am having issues with 3 pop-up regardensy.mobi

Hey guys, first time posting here and I hope you can help me.

I recently started to play skyrim and I installed some mods with Nexus. Since that, when my computer launchs, I got 3 pop-up on the bottom right corner of my screen. Those pop-up seem to be various publicity but I can see regardensy.mobi under each pop-up.

I did some search on how to remove it but it keeps coming back. I tried different program as spyhunter, malwarebytes and so on. At this point, I don't want to install anymore program to avoid getting more infected ...

I am running out of ideas and since it is a new computer, this is getting really annoying.

Is there anyone that could help me with this "virus"?

Thanks a lot!