We have more information about these 'tech support' scams malware in our Knowledge Base. If you're on a Mac, follow these instructions to remove any malware that may be causing the pop-up to appear. If you're on a Windows computer, follow these instructions to remove any malware that may be causing the pop-up to appear. We put together a guide on how to remove malware. If you clicked an ad in a pop-up on a free streaming site, you may want to scan your computer for viruses and malware. When you restart your browser, don't reopen your previous tabs, and don't click the link you visited immediately before you got that virus warning. You may need to force your browser to quit. You should immediately close your browser. Seeing a strange and alarming pop-up when visiting a website?