: Open Command Prompt as administrator and type ipconfig /flushdns , then hit Enter.
任何一个环节出现问题，都会触发安装程序的中断。 3utools installation package validation failed
: Go to Windows Security > Virus & threat protection > Manage settings and toggle Real-time protection off temporarily. : Open Command Prompt as administrator and type
If you are using a VPN or proxy, turn it off, as it can interfere with server handshakes. turn it off
: Unstable internet connections break the installer file.
当遇到验证失败时，建议按照以下由简到繁的顺序逐一尝试，绝大多数问题都能在第三步之内解决。