-
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
-
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
- HP Community
- Notebooks
- Notebook Wireless and Networking
- Need PCI device driver for HP Pavilion 15-au027tu

Create an account on the HP Community to personalize your profile and ask a question
09-07-2018 10:15 PM
HELLO
I'm using HP Pavilion 15-au027tu, and my laptop only be able to use window 10. however, i try to install window 8.1 pro, and now, i can not find PCI device driver and an unknowndriver.
where can i find them?
thanks!
Solved! Go to Solution.
Accepted Solutions
09-08-2018 08:20 AM
Hi:
You need this W8.1 driver for the unknown device...
HP 3D DriveGuard Software
https://ftp.hp.com/pub/softpaq/sp78001-78500/sp78105.exe
09-07-2018 11:38 PM
Really hard to say without knowing the hardware id of each device. In Device Manager right click and choose Properties. Go to Details tab and use the dropdown selector to get hardware id.
**Click Accept as Solution on a Reply that solves your issue**
***Click the "YES" button if you think this response was helpful.***
09-07-2018 11:47 PM
@DYD wrote:HELLO
I'm using HP Pavilion 15-au027tu, and my laptop only be able to use window 10. however, ...
Your machine came with FreeDOS2.0 actually. Please try the following Realtek Card Reader Driver:
https://ftp.hp.com/pub/softpaq/sp78001-78500/sp78362.exe
Regards.
***
**Click the KUDOS thumb up on the left to say 'Thanks'**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.
09-08-2018 08:20 AM
Hi:
You need this W8.1 driver for the unknown device...
HP 3D DriveGuard Software
https://ftp.hp.com/pub/softpaq/sp78001-78500/sp78105.exe