To start here's my specs
B450-f Gaming II Board
R7 3700X (8/16)
Windows 10 21H2 (amd drivers installed from MFG)
So Ryzen Master has been running fine for a year(?) now. While I slept, my PC would reboot. Event viewer shows "AMDRyzenMasterDriver service failed to start". I've done a complete uninstall with uninstaller, removed every instance of Ryzen Master found in the registry removed. I'm not sure where to take it from here. It's really starting to become way more than a nuisance. Any ideas??
It sounds like Ryzen Master somehow got corrupted either before or when you restarted your PC.
Try installing Ryzen Master again and see if it installs successfully. If it doesn't then download Microsoft Install/Uninstall app and use it to remove Ryzen Master from your computer: Microsoft Install/Uninstall Tool
The MS App is useful because it deletes all traces of the program that prevents it from being installed or uninstalled including Registry entries.
Also reset your Motherboard's BIOS back to factory default either by using CMOS CLEAR method or through BIOS itself. This should eliminate any settings that Ryzen Master might have altered or influenced in BIOS.
NOTE: Here is Ryzen Master for the R7-3700x Processor: https://www.amd.com/en/support/cpu/amd-ryzen-processors/amd-ryzen-7-desktop-processors/amd-ryzen-7-3...