The driver serves several functions depending on the device's state:
Windows doesn't natively recognize a phone in EDL mode as a usable device. Without qcser.inf
If you’ve ever tried to unbrick a phone or flash new firmware on a device with a Qualcomm chipset The driver serves several functions depending on the
Microsoft has significantly tightened security regarding driver signatures. To prevent malware from masquerading as hardware drivers, Windows requires that all drivers be digitally signed. Furthermore, Windows maintains a catalog of cryptographic hashes (essentially digital fingerprints) for system files. or internal IT knowledge base.
Here’s a short informational post about — suitable for a tech forum, blog, or internal IT knowledge base.