In the context of virtualisation, a "Windows 10 Qcow2 Download Fixed" refers to a pre-configured QEMU Copy-On-Write (QCOW2) virtual disk image that has been set with a fixed allocation (pre-allocated) size rather than a dynamic one
qemu-img convert -f qcow2 -O qcow2 -o preallocation=full windows-10-fixed.qcow2 windows-10-fast.qcow2
Once you have a verified, fixed download, you can apply performance patches to make it run 40% faster on KVM. Windows 10 Qcow2 Download Fixed
The Fix: Convert to a modern Qcow3 file with cache writeback: In the context of virtualisation, a "Windows 10
Method 2: The Quick Download (Community Maintained)
If you cannot use command line, a community-maintained "fixed" Qcow2 image is available via multi-threaded download. As of this writing, the hash-verified version is hosted on images.linuxcontainers.org: In the context of virtualisation