Intel QST is an Intel-specific standard for monitoring of all kinds of hardware values. It's built in the chipset as an Intel Management Engine subservice. Usually the QST delivers many values and HWiNFO32 displays them.
Without a Debug File it's hard for me to determine what happens in this situation. You might want to check if there's an updated version of the Intel HECI driver available, or try a BIOS upgrade if available.
In case HWiNFO32 hangs during Debug Mode, you can send me the HWiNFO32.DBG file it created and I could check why it happens. What happens in this case - does the complete system crash, freeze or just the HWiNFO32 hangs? How long have you waited (since in Debug Mode the scan on some systems might take much longer than without Debug Mode).