SIGVERIF
There is only one tool I could find that is used to verify digital signatures for system files and device drivers, it is called the signature verification tool otherwise known as Sigverif.exe.
1. Only administrators can install a hardware device if any type of user input is required. Any user can install a hardware device only if the following are true: the device drivers can be installed without user input, all files necessary for a complete installation are present, the drivers have been digitally signed ( digitally signatures are digital codes that can be used to authenticate the sources of files), and there are no errors during installation. If one of these conditions is not met, someone logged onto the system with administrative privileges must do the installation.
Two names for the database that holds digital signatures provided by an operating system are the "Trusted Platform Module (TPM)" and the "Certificate Store." The TPM is a hardware component that securely stores cryptographic keys and digital signatures, while the Certificate Store is a software repository used to manage and validate digital certificates and signatures within the OS.
Windows 95 & Windows 98
The base system device drivers for the HP Pavilion dv6408nr notebook PC can be obtained from Hewlett Packard. This information is available on their website.
A digital device sins is a specific operating system dedicated to maintain the device's networking capabilities. It is an integral component for any wireless device.
Windows 95 & Windows 98
Every hardware device requires a software program that provides an interface between the operating system and the hardware itself. These programs are known as the hardware device drivers.
Device Manager
I don't know what it means
DAC - Digital to Analog ConverterADC - Analog to Digital Converter
In Device Manager, a question mark next to a device indicates that the operating system cannot identify the device or that the necessary drivers are not installed. This can occur if the device is new, if the drivers are out-of-date, or if there is a hardware issue. To resolve this, you can try updating the device drivers, uninstalling and reinstalling the device, or checking for hardware malfunctions.