The fastest way to find your Windows version

The quickest method is to press Windows key + R on your keyboard, type winver, and press Enter. A window will open showing your Windows version, build number, and OS build. This takes about five seconds and works on every Windows computer.

If you prefer not to use the Run dialog, you can also right-click the Start button, select System, and scroll down to find "Windows specifications" — this shows the same information but takes a few more clicks.

Key Takeaways

  • Press Windows key + R, type winver, and press Enter to see your exact Windows version and build number in seconds.
  • Your version number (like 22H2 or 21H2) tells you which major update you are running; the build number is more specific.
  • Knowing your version matters for software compatibility, security updates, and troubleshooting problems with other programs.
  • Windows automatically installs updates, so your version may change without you doing anything.

Understanding what the version number means

Windows displays two related but different numbers. The version is the major release — common ones are 22H2, 21H2, or 20H2. The build number is more specific and changes with every security patch and update. For example, you might see "Version 22H2 (OS Build 19045.3693)" — the 22H2 is the version, and 19045.3693 is the build.

The version number tells you roughly when your Windows was last updated. A higher number means a more recent update. The build number is what Microsoft uses internally to track every single patch. If you are troubleshooting a problem or checking whether a program will run on your computer, you may need to share both numbers with technical support.

Using Settings to find your Windows version

Open the Settings app by pressing Windows key + I. On the left side, click System, then scroll down and click About. Under "Windows specifications," you will see your version, OS build, and system type (32-bit or 64-bit).

This method is slower than winver but shows additional details like your device name, processor, and installed RAM. It is useful if you need to gather multiple pieces of information about your computer at once. The information displayed here is identical to what winver shows — just organized differently.

Checking version through System Information

Press Windows key + R, type msinfo32, and press Enter. The System Information window opens with extensive details about your computer. Look for "OS Name" (which shows your Windows version) and "OS Version" (the build number). This tool shows far more than you probably need, but it is reliable and available on every Windows machine.

System Information is most useful when you are troubleshooting hardware problems or need to document your entire system setup. For just checking your Windows version, winver is faster. However, if you are already in System Information for another reason, you can grab your version number while you are there.

Finding your version on older Windows computers

If you are running Windows 7, 8, or 8.1, the winver command still works the same way. Press Windows key + R, type winver, and press Enter. The window will show your version as "Windows 7," "Windows 8," or "Windows 8.1" instead of the numbered format used in Windows 10 and 11.

Windows 7 and 8 no longer receive security updates from Microsoft, so if you are using one of these versions, you may want to plan an upgrade. Knowing your exact version helps you understand what support is still available and whether programs you want to use will run on your system.

Why you might need to know your Windows version

Software developers list Windows version requirements on their websites. If a program says it needs Windows 10 version 21H2 or later, you need to know your version to check compatibility. Some games, professional software, and security tools have specific version requirements.

Your version also matters for troubleshooting. If you contact technical support or post a question on a forum, the first thing they will ask is what version you are running. Knowing this information saves time and helps others understand your setup. Additionally, if you are waiting for a specific security patch or feature update, checking your version tells you whether you have received it yet.

Frequently Asked Questions

What is the difference between Windows version and build number?

The version (like 22H2) is the major update release. The build number (like 19045.3693) is more specific and changes with every patch. Think of version as the year of a car model and build as the exact production date. Both numbers together tell you exactly what you are running.

Will my Windows version change automatically?

Yes. Windows installs updates automatically by default, and major updates change your version number. You can check for updates manually by going to Settings > System > Windows Update, but you do not need to — they arrive on their own schedule.

Can I downgrade to an older Windows version?

Downgrading is technically possible but not recommended and requires reinstalling Windows from scratch. Most people stay with their current version. If you need an older version for software compatibility, contact the software maker to ask about alternatives.

Does my Windows version affect how fast my computer runs?

Not significantly. Newer versions sometimes run slightly faster or slower depending on your hardware, but the difference is usually small. If your computer feels slow, the problem is usually something else — too many programs running, a full hard drive, or aging hardware.

What if winver does not open?

Try the Settings method instead: press Windows key + I, click System, then About. If neither works, your Windows installation may be corrupted, and you should contact technical support or consider reinstalling Windows.