That's not far behind the 43.6% running Windows 10. It was one of the most loved PC operating systems, still raking in 36% of active users a decade after its initial release. If you're reading this and haven't moved on to Windows 10, it just goes to show the popularity of Windows 7. So unless you want to leave your laptop or PC open to bugs, faults and cyber attacks, you best upgrade it, sharpish. For those still using Windows 7, the deadline to upgrade from it has passed it's now an unsupported operating system.