Manjaro Linux is not available for Windows but there are some alternatives that runs on Windows with similar functionality. The best open source Windows alternative is Debian. If that doesn't suit you, our users have ranked more than 100 alternatives to Manjaro Linux and nine of them are open source and available for Windows so hopefully you can find a suitable replacement. Other interesting open source Windows alternatives to Manjaro Linux are ReactOS, Revision (ReviOS), HoloISO and Damn Small Linux.
The Debian Project is an association of individuals who have made common cause to create a free operating system. This operating system that we have created is called Debian.
ReactOS™ is a FOSS effort to develop a quality operating system based on the architecture of Microsoft® Windows™ NT family of operating systems, that is compatible with applications and drivers written for it (NT4, 2000, XP, 2003, Vista, 7).
ReviOS aspires to re-create what Windows as an operating system should have been - easy and simple.
The Zeal Operating System is a modernized, professional fork of the 64-bit Temple Operating System. Guiding principles of development include transparency, full user control, and adherence to public-domain/open-source implementations.
MINIX is a POSIX-compliant Unix-like operating system based on a tiny microkernel running in kernel mode with the rest of the operating system running as a number of isolated, protected, processes in user mode.
DebianDog is very small Debian Live CD shaped to look and act like Puppy Linux. Debian structure and Debian behaviour are untouched and Debian documentation is 100% valid for DebianDog. You have access to all debian repositories.
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Debian is open source, rock-solid and popular, particularly for servers, though desktops too. It uses the .deb package system; Manjaro doesn't. Manjaro is Arch-based. But Manjaro also works out-of-the-box in 95% of cases for me. Setting up Debian has always been a pain in the behind. But maybe that's just me. But try it. Might work for you.