I noticed this earlier today. I wondered what was going on.
An apparent system error left millions of visitors to the site puzzled when links to all search results were flagged with the warning ‘This site may harm your computer’.
It is thought the site had erroneously identified all other websites - and some of its own pages - as containing malicious software or ‘malware’.
The glitch, which prevented internet users from directly clicking through to search results, was fixed within 30 minutes although users of Google’s email service Gmail have since reported finding genuine messages sent mistakenly to spam folders.