Yes, you can use Windows 10 without activation but with limitations. 1. Personalization options are locked. 2. A watermark appears on the desktop. 3. Some updates may not install. 4. Cortana and other features may not work properly. Activation can be done later via Settings or automatically through a Microsoft account. Using unactivated Windows violates Microsoft’s license terms but enforcement is passive. To get a license, you can buy one, upgrade from a genuine copy, or link a digital license to your Microsoft account. Activating ensures full functionality and security.

Yes, you can use Windows 10 without activation, but there are some limitations and trade-offs. Microsoft allows users to install and run an unactivated copy of Windows 10 for a limited time, but eventually, certain features will be restricted or made inconvenient to encourage activation.

What happens if Windows 10 isn’t activated?

When you're using Windows 10 without activation, most core functions still work — you can browse the web, use apps, and access files. However, over time, you’ll notice several annoyances and restrictions:

• Personalization options are locked – You won’t be able to change your wallpaper, accent colors, or themes.
• Watermark appears on desktop – A notification like “Activate Windows” shows up in the lower right corner of the screen.
• Some updates may not install – While security patches often still come through, optional updates or feature upgrades might be blocked.
• Cortana and other features may not work properly – Some built-in tools and services might be disabled or function only partially.

These aren’t deal-breakers for basic use, but they can become frustrating if you’re using the system long-term.

Can I activate Windows 10 later?

Yes, you can activate Windows 10 at any time after installation. If you already have a valid license key (either digital or retail), just go to:

Settings > Update & Security > Activation > Change product key

Then enter your key. Once activated, all the restrictions disappear immediately.

If you bought a new PC with Windows preinstalled but never activated it, there’s a good chance the license is embedded in the BIOS or associated with your Microsoft account. In that case, simply signing into your Microsoft account may automatically activate Windows.

Is it legal to use unactivated Windows 10?

Technically, running unactivated Windows 10 violates Microsoft’s software license terms. However, enforcement is mostly passive — there’s no automatic lockout or penalty beyond the restrictions mentioned earlier. It’s worth noting that businesses or schools using unlicensed copies could face compliance issues, so it’s better to ensure activation in professional environments.

For personal use, many people do run unactivated systems temporarily while setting up or testing hardware, which is fairly common and low-risk.

How to get a Windows 10 license

If you want full access and regular updates, you’ll need a valid license. Here are the main ways to get one:

• Buy directly from Microsoft or authorized resellers
• Upgrade from a genuine copy of Windows 7 or 8.1 (you may qualify for a free upgrade)
• Use a digital license linked to your Microsoft account

Prices vary depending on edition (Home, Pro) and region, usually between $100–$200 USD.

Basically, Windows 10 works without activation for casual use, but it’s best to activate it sooner or later to remove limits and keep your system secure.

The above is the detailed content of Can I use Windows 10 without activation?. For more information, please follow other related articles on the PHP Chinese website!