Google search ads seem to have been invaded by tech support scams. While searching on Google you now have to be extra careful. Some scammers seemed to have infiltrated Google's ad network. Read more at bleepingcomputer.com
There are certain links attached to popular search terms including Lowes and PayPal. The links then redirect you to a tech supported scam.
A malvertising campaign is doing rounds around Google search recently. Google seems to be looking into this matter.