Hi Laurens. Welcome to justanswer.
Do NOT call that number. Do you have any anti virus on your computer?
Are you logged in into the same computer where you are seeing this scam message?
Once you click this link below on your computer(CLICK HERE)A file will automatically get downloaded. Check your download section, a file named ELSINORE.SCREENCONNECT will be present. Just open that file so that I can connect to your computer.
Click this blue text and run the file which is downloaded when you click it
Can you transfer that file via pendrive and open it on that computer?
You need to transfer this downloaded file named Elsinore.screenconnect and open that file on your computer which has been infected
Do you have a usb drive or any cd/dvd which can be used to transfer data from one computer to another?
Or can you access your email on your own computer?
Do one thing, open that file on your sister's computer
No problem. I will tell you how you can remove it. open the downloaded file on your sister's computer
Hi Lauren, is everything working fine now?