Is there a sure way to check whether I am running Windows 8 or 8.1?
When I right-click on Computer and select "Properties", I see "Windows 8 Pro" in the "Windows edition" section - but I don't know if Microsoft shows "8" regardless...
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Operating system Version number Windows 10 Insider Preview 10.0 Windows Server Technical Preview 10.0 Windows 8.1 6.3 Windows Server 2012 R2 6.3 Windows 8 6.2 Windows Server 2012 6.2 Windows 7 6.1 Windows Server 2008 R2 6.1 Windows Server 2008 6.0 Windows Vista 6.0 Windows Server 2003 R2 5.2 Windows Server 2003 5.2 Windows XP 64-Bit Edition 5.2 Windows XP 5.1 Windows 2000 5.0
It would say
Windows 8.1 Pro if you're using Windows 8.1.
However, if you really want to verify you can follow this from MS:
This tool will simply tell you, and provide you additional ways to get more info, such as:
Check for operating system info in Windows 8.1 or Windows RT 8.1:
1. Swipe in from the right edge of the screen, tap Settings, and then tap Change PC settings. (If you're using a mouse, point to the lower-right corner of the screen, move the mouse pointer up, click Settings, and then click Change PC settings.)
2. Tap or click PC and devices, and then tap or click PC info.
3. Look under Windows for the version and edition of Windows that your PC is running.
Check for operating system info in Windows 8 or Windows RT
1. On the Start screen, type Computer, press and hold or right-click Computer, and then tap or click Properties.
2. Look under Windows edition for the version and edition of Windows that your PC is running.
For me it shows this:
FYI, I simply Googled "windows check which version", that was the first result. Not really sure why it was necessary to ask here.