[How can I check to see if the digital signature timestamp of the Kaspersky program is valid and was not tampered with?]

hello @Frrigistune  see here How to verify if the downloaded Kaspersky Lab installer is genuine

Regards

 @bobbycooper Ah, what does it mean by ‘if the signature is invalid’ and how do i discern that it is invalid?
I’m really slow to understand, apologies.

[How can I check to see if the digital signature timestamp of the Kaspersky program is valid and was not tampered with?]

Does the signature have to correspond with the date I installed the program, or something else?