HP laptop Device Manager showed "Detection Verification" with ! (exclamation mark).

Solution:
1. Uninstall it.
2. Download the Realtek Driver form HP's product site and install it.
3. Installation will ask to uninstall the previous  driver, then system will reboot and install the downloaded one.
4. After installation, reboot the system again and check. It should work now,

https://h30434.www3.hp.com/t5/Notebook-Hardware-and-Upgrade-Questions/Detection-Verification-Driver-Could-Not-Load/td-p/6692791