SCAMMER WARNING: Due to a spate of recent scam attempts (some successful) recently, if you're doing a deal in the classifieds, ONLY USE PAYPAL GOODS AND SERVICES UNLESS YOU KNOW THAT INDIVIDUAL PERSONALLY. It's really not worth saving a few quid.
This ***t installs itself without your knowledge and completely stopped my Chrome browser.
Take no notice of any dire warnings it gives you and uninstall it. Revouninstaller zapped it off in no time.
I run Msoft SE on all my PCs now and don't have any problems. Worth running it on "full scan" once a month tho'...WHEN you can leave the PC on all day!
Dave.