Hi HenryLouis Welcome to Seven Forums.
To help us help you would you please add your systems specs? Here's how: System Info - See Your System Specs Under System Manufacturer/Model Number add whether it is a desktop or laptop and whether self built. Log in to Seven Forums and you will be able to transfer the info directly to the specs page in your profile from within the System Info app.
After doing this your specs will be available in each of your posts. Click on mine in the lower left to see how it should look.
Full instructions in the tutorial.
In my sig is a link to Malwarebytes free, download it, run the updates and doo a full scan. Let us know the results.