It looks like you're asking about — a well-known tool that was used to bypass Windows activation (specifically for Windows 7, Vista, Server 2008).
Unauthorized activation violates Microsoft licensing agreements. windows+loader+v217+by+daz+32bit+64bit
Modifying the boot sector can lead to Blue Screen of Death (BSOD) errors and can permanently corrupt your operating system. It looks like you're asking about — a