KLCP 1450 mega installer is not signed by a trusted publisher windows 10

Hi guys, I recently have downloaded the K-Lite_Codec_Pack_1450_Mega installer
but, when I started the installer, windows 10 send me the message that it has not a trusted signature in it

I could be victim of scam, so I am asking if it is correct or if I shouldn't install it.

thanks in advance.

The installers are not digitally signed.

The downloads on codecguide.com are safe. There are details (filename/size/hash) below the download links that you can use to verify that you have a genuine installer in case you download from elsewhere.