The main purpose of the digital certificate is to ensure that the application belongs to the entity to which the certificate was issued. The PC Drivers HeadQuarters digital certificate does not guarantee that a signed application is safe to run, but rather informs the user that the software was digitally signed by PC Drivers HeadQuarters and verified by a trusted Certificate Authority (CA).
About (from PC Drivers HeadQuarters at www.pcdriversheadquartersinc.com)
“PC Drivers Headquarters (DHQ) is the global trusted driver update authority. DHQ has produced some amazing and ingenious proprietary software for use in customizable user interfaces and intelligence containing databases for driver update functionality. This has propelled DHQ steadily upward since they started in 1996.”