Steam not updating vista
However, in the case of Steam, you will have to upgrade to a more recent version of Windows to continue using it on your PC - it simply will not run on your old XP / Vista installation, warned Valve in a blog post late last year.
Last year’s Steam Chat update was just the beginning, so hopefully we shall see more improvements this year now that legacy OS support has been given the boot.
The majority of these systems are likely in various businesses, rather than in homes, but on the off chance that you still used XP or Vista on a gaming PC, now would be the time to finally make the jump to something more up to date.
Despite increased competition in 2018, Steam is still the biggest marketplace for PC gaming.
By dropping support for XP and Vista, Valve won’t have to compromise on future feature updates for the sake of the few still using old operating systems.
With that said, Windows 7 and 8.1 will continue to be supported for the time being.
January 2019, Valve ended support for those using Windows XP and Vista operating systems with its Steam gaming client software.