I have experienced the very same behavior with the 6.0 update. Removal from "Programs & Features," + removal from File Explorer, + removal from the Registry by deleting all HWiNFO keys, + removal of Thermaltake software for controling fan speeds on the water block, continues to leave a situation that refuses to install the "6.0 driver." I had to step back two versions before I could reinstall HWiNFO version 5.88. Then I reinstalled the Thermaltake fan controller for the water block on the CPU.
I have generated the HWiNFO64.dbg file when I tried to install the 6.0 version, but am a loss as to how to attach it to this post. I also lost access to that file after I uninstalled everything I could think of and then reinstalled 5.88.
This program is important to me so I really want it fixed, but the Thermaltake program is critical to the system cooling so it must take precedence. You had it all working fine up until version 5.88. Somehow you need to do what you did then.
At present I am using the 5.88 version with the Thermaltake fan controller software working fine.
How do you send a post with the attached file?