Another crime associated with spoofed URLs is setting up a fake anti-malware software. An example of this would be Ransomware, fake anti-malware software that locks up important files for the computer to run, and forces the user to pay a ransom to get the files back. If the user refuses to pay after a certain period of time, the Ransomware will delete the files from the computer, essentially making the computer unusable. Ads for these programs usually appear on popular websites, such as dating sites or social media sites like Facebook and Twitter. They can also come in the form of attachments to emails.