Qualcomm drivers signed for Qualcomm Android Smartphones. You can download this full Q-USB (Qualcomm HS-USB QDLoader 9008) from blew link. This qualcomm drivers signed package is tested and verified. Qualcomm drivers signed is needed to flash dead smartphones.
In case if your smartphone get bricked by some how and only shows HS-USB QDLoader 9008 Q-USB in device manager and you want to restore it with QPST Tool which also known as Qualcomm flashing tool then this qualcomm drivers signed is a must.
Download Qualcomm Drivers Signed 2019
This Driver Package is only Supported OS : Windows XP / Windows Vista / Windows 7 / Windows 8 / Windows 8.1 / Windows 10 both 32 and 64 bit
Note : You don’t Need to Enter Disable Driver Signature Verification Option in Windows 10 and SO.