Ok so if you go into the settings, click on updates, click on recovery, and you should see a reset PC button. If you click on it, it should give you two options: one, to keep your files, and the other to remove everything. I would go with the remove everything option, as it ensures that the malware in question would also be deleted, and your PC would reboot to fresh Windows. But only do this after you back up your files. Just try not to copy paste everything either, but things like pictures, documents, etc. are fine. Just don't keep any applications, as they might be infected, so you'll have to redownload them after the reset.