Don't think so.

Also, question is "will Chrome web browser end support of WIndows 10 anytime soon"?
If not, answer to Steam question is no too. :)

Steam usually supports a OS that reached the end of offical support for 2-3 more years.
Was that way with XP, Vista, 7 and 8. So no need to worry right now or in the near future.

No. Win 10 will still get security updates for people paying for it, for a few years.

And the only reason Win 7 went away is because the Chromium people stopped supporting it, and Steam's client uses Chromium.

It'll be a good few years yet before this happens for 10.

The inexorable march of progress in the field of technology means that while yes, it will someday happen. Like it's happening with Windows 7, despite people trying to cling onto that OS with incompatible updates from a shady third party source. But, Windows 10 might not have to worry about that until 2028 at the earliest. It's entirely possible Steam Support for Windows 10 will continue into 2029.

The era of free software updates for Windows 10 will stop on October 14, 2025.

Until the version of CEF Steam 2 uses for their client stops supporting W10 you're fine.

It took about 4-5 years since the end of life for Windows 7 before Steam officially dropped support for it. Expect the same for Windows 10.

And given Windows 11's hardware requirements, I expect that Windows 10 will take far longer before platforms begin to drop it.

Look here: https://psteamproxy.yuanyoumao.com/hwsurvey/

When Windows 10's platform share drops to about 10%, then Valve will think about when to drop support. And when that happens, they'll inform people of this intent. The last time that happened, people were given 1 years notice in advance.

Most likely windows 10 will last until 2028-2030 possibly. AT least for steam games. As others have said, 5 years most likely is the best scenario. Worst scenario they will do it after the end of life of windows 10 where it does not get anymore updates in October this year.

win10 and win11 fundamentally the same built product. wundows usually rolls out in 2s. if win12 comes out this october. then start to worry

引用自 Ancare 1413：

I heard some rumors and now im worried

Not until multiple years after Microsoft ends support for Windows 10.

引用自 Ancare 1413：

Is valve going to end windows 10 support soon?

There is nothing to worry. Valve will continue to support Windows 10 until Chromium support for Windows 10 lasts. Even then it'll take Valve year or more to transition to non compatible version. Google won't stop support for Windows 10 until Windows 10 LTS program ends and will probably take them year to push out version that no longer support Windows 10. Exact time may depend on how fast the Windows 10 usage drops, especially on enterprise front as Google may want to continue support it's enterprise customers as long as possible.

Considering all this Valve is likely to continue Windows 10 support until 2030. However anyone planning to continue using Windows 10 past October 14, 2025 should seriously consider subscribing to Extended Security Updates as otherwise their system will become vulnerable from that point on. ESU gives Windows 10 additional 3 years of security updates.

https://learn.microsoft.com/en-us/windows/whats-new/extended-security-updates

i strongly doubt that Valve will drop 50% of it's player base according to the Feb 2025 hardware survey win 10 usage is at 54.66%

https://psteamproxy.yuanyoumao.com/hwsurvey/directx/?sort=pct

Maybe when Win10 userbase on Steam drops to less than 1%. How many years could that be? Who knows.

Given Win 7 is still operable, likely a decade from now before Win 10 goes. As far as "official' support, probably just a couple few more years.

Support won't end until around 2032, this is because Microsoft needs to support Edge on Windows 10 IOT LTSC. So there's years left.