According to Intel  CLICK ME the chipset drivers should define it.

I would do a CMOS Memory (BIOS) reset as a first step.  If the BIOS is not recognizing it or properly recognizing it then Windows will not.  Considering its used I would just replace the CR2032 battery.  They are cheap and available almost everywhere,  To reset CMOS/BIOS memory, power off PC, disconnect AC power cord then hold the power button for a short period to drain any residual power supply power.  Open the case and locate the CR2032 battery on the motherboard.  Remove battery but wait 5 minutes before installing the new battery.  Power on and see if that fixes it.  If not reinstall the Intel motherboard chipset drivers.   If that does not fix it, I would suspect a hardware problem on the motherboard (maybe why it was sold used).

Support for OptiPlex 3020 | Drivers & Downloads | Dell US

Cheers,

Everything on the unit appears to work, i will try battery, but BIOS update went fine and i loaded defaults before installing windows 10, ive already tried the intel chipset but get this error

0x00004e24 this platform is not supported

thansk

 Carl

cheers, downloaded both files in that link, not ones off dells support pages, one failed to install, other worked fine and is recognised

the chipset drivers was first i went to install, but windows had done a load of updates prior to doing drivers

I have this same issue and same Hardware IDs.  But none of the links take me any where for the download for the driver?  Can someone help?  I have the same 3020M model.

If anyone can send me the correct links to fix this issue would be appreciated.  Thanks