Hi. I had the same problem, only Peripherals displayed correctly. Initially Speccy (v 1.32.740) was working normally. Then, for some un-known reason, it showed 'Access is Denied' even under Administrator account or opening it as Administrator (Run as Administrator). After un-installing, re-starting and downloading the portable version, the same error occurred. Only after having to Shut Down my PC, when I logged in, it was working as normal again.
Also, Hyper-V was working normally after the Shut Down, having re-named my PC a week earlier. Perhaps, re-naming my PC affected Speccy as well.