How do I get rid of unnecessary notifications?

For a few days now I've been getting notifications like this on my laptop in the right corner. These are things like »Click here to install ad blocker!« Or »Fette DEALS to save money; 24/7 bargains - available immediately! «.

My problem is that I don't even know what my fault is and how I can fix it. Since I've been getting these notifications, my laptop spins now and then: /

Do you have any ideas how to solve this?

I suspect that is due to your browser.

so open Firefox, Chrome, Edge etc.

then go to the 3 dots on the right

settings

looking for notifications

there you can turn off the notifications

You probably have malware on your laptop and you should reinstall it

Which operating system are you using? Windows 10?

Apparently you caught a trojan. How dangerous it is and whether it only displays advertisements can hardly be judged. That is why the best solution is to copy the files that have just been changed and restore the previous status from your backup. You have a backup of the working operating system, right?

Otherwise, the ADWCleaner can help a little, but the Defender can also remove a few pests in an offline scan. But it is not 100% certain. I wouldn't rely on it, but either import a backup or set up the system again right away.

In the future, be more careful what you click on. Apparently some download got you into trouble.

I would disconnect the PC from the Internet so that if it is spyware it can't send any data to the attacker and then reset the PC or, if you have a backup, reset it

What are you telling about a trojan etc?
Why should that be a trojan?

In my opinion, this software is very dubious.
simply deactivate the notifications for the browser…

And why does the browser display advertisements on the Windows taskbar? Which browser allows that?

Which software is dubious? Windows 10, ADWCleaner, Defender? No, everything is extremely serious.