hal.dll
This file is not a system component: windows itself, not a download. Restore it from the source that installed it rather than downloading a replacement.
Do not download this DLL on its own
Searching for a missing DLL by name leads to sites that hand you that single file. It is one of the oldest and most effective malware delivery methods there is, and a system DLL from an unknown source is indistinguishable from a deliberately modified one. There is never a legitimate reason to obtain a runtime component that way.
What it is
The Hardware Abstraction Layer, which sits between Windows and the physical machine. It is loaded during boot, before anything else runs.
Where you see it: A boot failure reporting that hal.dll is missing or corrupt, which stops the machine before Windows starts.
This is almost never actually about the file. In the overwhelming majority of cases the boot configuration points at the wrong partition, usually after cloning a disk, changing boot order or a failed update. Boot from Windows installation media and use Startup Repair, or rebuild the boot record with bootrec. Copying a hal.dll from another machine will not fix a boot configuration problem and can make recovery harder.
Why there is nothing to download here
There is no verified download we can offer for this one, because installing a file is not the fix. The steps above are what actually resolves it. That distinction matters: the sites ranking for this file name are selling a download that would not have helped even if it were safe.