10900K. Core limit parameters are missing. Someone I've spoken seems to think these disappear from HWiNFO if Core Isolation/Memory Integrity is enabled in Windows Defender. Core Isolation uses Hyper-V.Which CPU, can you post a screenshot what exactly is missing? Is it missing in 4460 too?
Yes, this could be caused by Core Isolation, that masks several registers needed. If you post the HWiNFO DBG file I can check if it's that case.
Is there any way around that or will it have to be off to get the Core performance readings?Yes, it's blocking access to the Core performance limiter registers.
Thanks.No way around - that protection is via VM and that cannot be circumvented. You'll need to allow HWiNFO or disable that feature.