Build 22000.978 is an old revision. Official current builds have progressed much further (e.g., Build 22000.3260 as of late 2024). Safe Alternatives
If you need a clean or specific version of Windows, always use official Microsoft sources: Build 22000
If you must have 21H2 for compatibility, tools like Rufus can sometimes fetch older official versions directly from Microsoft's servers, which is safer than using a modified "San Lex" file. Downloading this specific modified ISO ("San Lex") is
Downloading this specific modified ISO ("San Lex") is due to significant security risks and its outdated status. Security and Legitimacy Report Build 22000
Windows 11 version 21H2 (Build 22000) reached its end of servicing for Home and Pro editions on October 10, 2023 . It no longer receives critical security updates, making any PC running it highly vulnerable to new threats.