> The main culprit, according to Valve, is the built-in Chromium-based browser that Steam actually uses to render the Steam store and other bits of the UI. Chrome dropped support for Windows 7 and Windows 8 right around the same time that Microsoft ended support for the operating systems earlier this year. Versions that still work in Windows 7 and 8 will be susceptible to security bugs and, increasingly, rendering bugs and other functional problems as time goes on.