To download and use the official, free HP Cloud Recovery Tool:

: Files from "DLL download" sites are not approved by developers and may be infected with viruses or trojans.

For most HP consumer PCs made after 2016, HP has replaced the old manager with the HP Cloud Recovery Tool need to download HP Recovery Manager

Windows can often repair missing or corrupted DLL files automatically.

Here are the risks of downloading harddisk.dll from a third-party DLL repository:

Insert a blank USB flash drive with at least 32GB of storage space.

Open the HP Support Assistant app on your computer and check for software updates. 2. Run a Repair Upgrade on Windows

How to Fix HP Recovery Manager "HardDisk.dll Missing" Error: Free Download & Solutions

What is the mentioned in the error? What version of Windows is your HP computer running?