Details
During NX installation, the message "The program's digital signature is invalid" is displayed
Solution
Run: certmgr
Check to see anything under the Trusted Root Certification Authorities tab?
Is there a GlobalSign line with the Friendly Name of Google Trust Services - GlobalSign Root CA-R2 ?
It is possible that the machine has a corrupted or missing root certificate store.
Not sure how the machine does much if this is the case as root certificates are checked a lot in daily OS use.
Info on configuring the trusted roots with a section on doing this on disconnected machines:
https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-R2-and-2012/dn265983(v=ws.11)
Hardware/Software Configuration
Platform: INTL64
OS: windows
OS Version: 1064
Product: NX
Application: SYSTEM
Version: V1859
Function: WNT_INSTALL
Ref: 002-8015448