Health.exe Acts as a Cryptomining Trojan
Health.exe is the name of a file that has been identified as malicious. The malware acts as a cryptocurrency mining Trojan.
Cryptomining Trojans or cryptojacking malware, as they are sometimes called, are malicious applications that abuse the victim system's hardware resources to mine cryptocurrency for the profit of the malware's operator.
Some very certain signs of a process being a cryptojacker or a crypto Trojan is seeing unusually high GPU or CPU use from a process you're not familiar with, that is spiking in resource usage even when your system is in desktop idle mode.
This will always lead to severely impaired system performance, sometimes even to the point where opening other applications or simply using a browser becomes a very slow and cumbersome task. With CPU cycles eaten up by the cryptojacker and likely your GPU being at or near 100% usage, even watching a simple video online is problematic.
If you run into similar symptoms and you find the Health.exe process in your Task Manager, with high resource usage being reported, you'll know what the source of the problem is and what is going on.
Removing similar malware will often require the use of an anti-malware software suite, as some of them have persistence mechanisms that help them power through simple deletion of the file associated with the process in a single location.