CPU temps not detected

[driftwood]

I have been using Fan Control V214 on my gaming system for a couple of years.
I like it and find it will manage the cooling even on the hottest days.

Yesterday I started the system it and got a notice from fan control saying CPU sensers not detected.

I ran OpenHardware Monitor and they were missing from there also.

I then ran HWiNFO but they were showing in there.

A youtube search suggested a variety of soluitions.
I tried the ones I thought might help my situation.
I have the latest chipset drivers, but ran the install again.
Checked for malware.
Ran system file checker.
I uninstalled Fan Control and installed the latest version, V240
It finds all the fans and allows me to name them but still won't detects the CPU temps. 

I am at the head scratching stage, so any help would be appreciated.

[king1]

any driver errors in the device manager

[driftwood]

No, first thing I looked at.

[king1]

the fact that HWiNFO detects them suggests it is not hardware so maybe a system restore back to yesterday or the day before might help.

also check if any windows updates occured that night that might explain it...

[driftwood]

The system file checker found some errors and corrected them, so I'm not sure how well a restore would work out, or if it's even turned on.
There has been several windows updates during this time period and who really knows exactly what they contain.
I know Defender doesn't like FanControl, it's tried to block it a couple of times.

I'm currently running without the FanControl and the system is performing ok.
Just using the standard Q-Fan setting in the bios.
CPU temp has never been a problem; it's the GPU temps I like to keep an eye on..