I wrote a program to detect HyperThreading (HT) using WMI. Would you mind testing on your machine(s)? It only works on Windows XP SP3, Windows Server 2003, and later, because that is when MS introduced the required APIs. Other than that, the only requirement is that you actually know whether or not your hardware supports HT. I would like this tested on machines that have HT and those that don't, but please report which you have with your results. Thanks! I appreciate the help.

* Use WMI to determine if HyperThreading is turned on
* This only works on Windows XP SP3, Windows Server 2003, and later because
*	underlying Windows APIs were not added until those versions.
Local lcWMIFolder, loWMI, lcolProcessors, loProcessor

lcWMIFolder = Addbs(GetEnv("SystemRoot")) + "System32\WBEM\"
If Directory(lcWMIFolder)	&& make sure installed
	loWMI = GetObject("winmgmts:\\.\root\cimv2")
	lcolProcessors = loWMI.ExecQuery("Select * from Win32_Processor")
	For each loProcessor in lcolProcessors FoxObject
		If Type("loProcessor.NumberOfCores")<> "U" and Type("loProcessor.NumberOfLogicalProcessors")<> "U"
			? "CPU Manufacturer:", loProcessor.Manufacturer
			? "CPU Name:", loProcessor.Name
			? "Number of Physical Cores:", loProcessor.NumberOfCores
			? "Number of Logical Processors:", loProcessor.NumberOfLogicalProcessors
			* If logical processors > actual cores, HT must be turned on
			If loProcessor.NumberOfLogicalProcessors > loProcessor.NumberOfCores
				? "HyperThreading is ENABLED"
			Else
				? "HyperThreading is DISABLED or unavailable on CPU"
			EndIf 
		Else
			? "HyperThreading detection not available on this O/S"
		EndIf 
	EndFor 
Else
	? "WMI is not installed."
EndIf