The appeal of Windows Loader 2.2.2 lies in its simplicity and purported effectiveness. It is often sought after by users who find themselves in situations where they cannot activate their Windows 7 installation through conventional means. However, like all activation tools, it walks a fine line between utility and legality.
No. The original 2.2.2 loader works only on BIOS/MBR systems. For UEFI, you’d need a different (and even riskier) tool like "Windows 7 UEFI Loader" – most contain malware.