: These are "bootleg" versions of Windows that are not supported by Microsoft and may be considered illegal to distribute.

: This build removes numerous standard Windows features like Cortana and Windows Defender .

: Community consensus suggests avoiding these builds for sensitive tasks like online banking ; they are best suited for dedicated gaming machines or older, low-power hardware.

: Often includes multiple custom themes (e.g., Dark Crystal Mac), unique icons, and crystallized mouse cursors.

: Because Windows Defender and Windows Update are often completely disabled or absent, the OS does not receive official security patches.