Free & open source alternatives to Windows

3 free operating system apps to use instead of Windows by Microsoft

The best free alternative to Windows is Linux Mint. The most Windows-like Linux, and it runs smoothly on older hardware.

Other great options: Zorin OS and Ubuntu.

Quick pick: For an older PC and a Windows-like desktop, use Linux Mint. For beginners who want a polished, Windows 11 style look, use Zorin OS.

Reviewed November 2026 against each vendor's official website.

Official ways to use Windows for free

Windows 10 and 11 can be installed without activation: they still run, but show a watermark in the corner and lock personalization such as wallpaper and themes. Proper long-term use requires a license.
Windows 10 reached end of support on October 14, 2025 (only conditional Extended Security Updates remain). Older PCs that can't run Windows 11 can switch to one of the Linux options below.

Free plans and trial lengths are set by the vendor and can change. Check the official website before signing up.

3 best alternatives to Windows

Linux Mint

PC utilities

Open sourceSome learning curve

The most Windows-like Linux, and it runs smoothly on older hardware.

The most Windows-like Linux distribution, with a browser, LibreOffice and media players preinstalled. A good fit for older PCs that cannot run Windows 11.

Familiar Windows-like desktop with wide language support
Runs smoothly on old hardware, little malware

Platforms: Linux

Linux Mint details Official website ↗

Zorin OS

PC utilities

Open sourceEasy to use

A Windows 11 style interface that is easy for newcomers.

Linux distribution made for people switching from Windows, with a Windows 11-style layout. It can run some Windows programs through Wine.

Polished and beginner-friendly
Simple installation of Windows apps

Platforms: Linux

Zorin OS details Official website ↗

Ubuntu

PC utilities

Open sourceSome learning curve

The most popular Linux distribution, well suited to developers.

The most popular Linux distribution for desktops and servers. LTS releases get 5 years of updates.

Large community, easy to find guides
Well suited to developers

Platforms: Linux

Ubuntu details Official website ↗

Quick comparison

App	Type	Platforms	Ease of use	GitHub stars
Linux Mint	Open source	Linux	Some learning curve	—
Zorin OS	Open source	Linux	Easy to use	—
Ubuntu	Open source	Linux	Some learning curve	—

Open source: anyone can use, study and modify it, including businesses. Free: no cost, but the code is closed. Freemium: a lasting free plan with paid tiers for extra features. Source available: code is public but the license adds conditions.

FAQ

What is the best free alternative to Windows?

The most popular picks are Linux Mint, Zorin OS and Ubuntu. For an older PC and a Windows-like desktop, use Linux Mint. For beginners who want a polished, Windows 11 style look, use Zorin OS.

Can I still run my Windows programs after switching to Linux?

Many popular apps have Linux versions or web equivalents (browsers, LibreOffice, VLC, GIMP), and some Windows programs run through Wine or Steam's Proton. But specialized business software, some games with anti-cheat and certain hardware drivers only work on Windows, so check the programs you depend on before switching. Linux is a great fit for browsing, study and everyday office work.