Hi,
The failure code indicates that the hard drive has failed the full test and needs to be replaced. If you can still boot into OS you should backup all your important data.
So what you need is a 2.5" SATA3 hard drive (max 2TB because of the thickness of drive). You can get from your preferred brand such as Seagate, WD...
Example:
or you could opt for a 2.5" SATA3 SSD which would improve the everyday performance of the PC
Example:
On page 31 of the service manual you can see the steps to replace drive:
http://h10032.www1.hp.com/ctg/Manual/c05473330
You will need to reinstall the OS on the drive, either by using recovery disks, migrating a backup image or by downloading media creation tool from Microsoft on different PC (or yours if still working) running and creating a bootable pendrive with the OS on it on a different computer. (there is an explanation on the Microsoft web page on how to create the pendrive) Windows will automatically activate once installed and connected to the Internet.
https://www.microsoft.com/en-us/software-download/windows10
If you choose this option you will need to use the pendrive to perform a clean install of Windows 10. You might need to disable fastboot and secure boot in BIOS (probably not). So, insert the pendrive in the PC and it should boot directly from the drive. If not, turn off the PC by holding the power button. Press the power button and immediately keep pressing ESC until the startup menu appears and then press F9 and choose the pendrive in the boot menu. Once it boots from pendrive follow the procedure to install Windows.
When finished installing allow Windows to completely update and find all or most drivers. You can follow this process by going into settings > Security and update > click on Verify for updates. You might need to reboot a couple of times. Once completely updated you can go into device manager and see if there are any missing drivers (there will be yellow exclamation mark next to the device). You can find these drivers and software on the HP support page for your product.
https://support.hp.com/us-en/product/hp-pavilion-15-br100-x360-convertible-pc/16842292/manuals
I recommend installing HP support assistant which will help to keep drivers up to date and much more. Here you can download latest version
https://www8.hp.com/us/en/campaigns/hpsupportassistant/hpsupport.html
Hope it helps,
David
Please click on thumbs up for thanks
Please click on accept as solution if answered your question