If you are trying to disable Hyper-Threading in Windows, there is one important thing to know first: Windows itself usually does not provide a direct switch for turning Hyper-Threading on or off. The setting is generally controlled through your computer’s BIOS or UEFI firmware.
Intel calls its simultaneous multithreading technology Hyper-Threading, while AMD commonly uses the term SMT, or Simultaneous Multithreading. The basic idea is similar. A physical CPU core can present more than one logical processor to the operating system, allowing the processor to handle multiple instruction threads more efficiently.
There can be specific reasons to disable this feature, such as troubleshooting certain software, testing CPU behavior, reducing the number of logical processors available to an application, or following a particular security or performance configuration. However, disabling it can also reduce multitasking and application performance.
In this guide, you will learn what Hyper-Threading does, where its setting is located, how to disable it, and how to confirm that Windows recognizes the change.
Hyper-Threading and Its Features
Hyper-Threading is a CPU technology that allows a single physical processor core to appear as multiple logical processors to the operating system. For example, a processor with four physical cores and Hyper-Threading enabled may appear in Windows as having eight logical processors.
This does not mean the CPU suddenly has eight full physical cores. Instead, Hyper-Threading allows a physical core to work on multiple instruction threads more efficiently by sharing certain processor resources.
One of the biggest features of Hyper-Threading is better multitasking. When one thread cannot fully use all of a core’s available resources, another thread can potentially use some of those resources. This can improve overall processor utilization.
Hyper-Threading can also help with multithreaded applications. Programs designed to divide their workloads into multiple threads may benefit from having additional logical processors available. Video rendering, compression, software compilation, virtualization, and some professional applications can see performance improvements depending on the workload.
Another feature is improved system responsiveness under heavy workloads. When many applications are running simultaneously, additional logical processors can give the operating system more scheduling options.
However, Hyper-Threading does not always provide a large performance improvement. The actual benefit depends on the processor, application, workload, and operating system. In some situations, disabling it can produce little noticeable difference, while in others it can reduce performance.
It is also important to understand that Hyper-Threading is not normally disabled through Windows Settings. Windows can manage logical processors, but the firmware controls whether the CPU exposes those additional logical processors in the first place.
Disable Hyper-Threading in Windows
- Restart your computer and enter the BIOS or UEFI firmware settings before Windows starts.
- Find a processor setting named Intel Hyper-Threading Technology, Hyper-Threading, SMT, or a similar option.
- Change the setting from Enabled to Disabled, then save your changes and exit the firmware settings.
- After Windows starts, open Task Manager > Performance > CPU and check the Logical processors and Cores information to verify the change.
The exact names and locations of these settings vary between computers. A Dell computer can use a different firmware menu from an HP, Lenovo, ASUS, MSI, Acer, or custom-built PC.
Some computers also do not provide an option to disable Hyper-Threading or SMT at all.
Step 1: Check Your Processor and Current Logical Processors
Before changing anything, it is a good idea to check how Windows currently sees your CPU. Right-click the Start button and select Task Manager. You can also press Ctrl + Shift + Esc to open it directly.
Select Performance from the left side and choose CPU. Look for the Cores and Logical processors entries. If your processor has multiple physical cores and each core exposes multiple logical processors, the logical processor count will normally be higher than the core count.
For example, if Windows shows 8 cores and 16 logical processors, that indicates that the CPU is currently exposing 16 logical processors. This is useful information to record before making any firmware changes.
Step 2: Save Your Work and Prepare to Restart
Changing a processor setting requires you to leave Windows temporarily and enter your computer’s UEFI or BIOS configuration. Before restarting, save any documents and close applications that you are currently using.
You should also understand that BIOS and UEFI settings affect how your computer hardware operates. Avoid changing unrelated settings while you are there. If your firmware screen contains many advanced processor, memory, voltage, or boot options, focus only on the setting associated with Hyper-Threading or SMT.
If you are using a laptop, connect the AC adapter before restarting. This helps prevent the computer from shutting down unexpectedly while you are working in the firmware interface.
Step 3: Enter the BIOS or UEFI Settings
You can usually enter firmware settings by restarting the computer and repeatedly pressing a manufacturer-specific key during startup. Common keys include F2, Delete, F10, F12, or Esc, although the correct key depends on the computer manufacturer.
There is also a Windows method that can be easier for beginners. Open Settings > System > Recovery in Windows 11. Under Advanced startup, select Restart now. After the computer restarts, choose Troubleshoot > Advanced options > UEFI Firmware Settings > Restart.
On Windows 10, you can generally reach the same recovery area through Settings > Update & Security > Recovery, then select the appropriate Advanced startup option.
If your computer does not show UEFI Firmware Settings, you may need to use the manufacturer’s startup key instead.
Step 4: Find the Hyper-Threading or SMT Setting
Once you enter the BIOS or UEFI interface, look through the available processor or CPU configuration sections. The setting may appear under menus such as Advanced, CPU Configuration, Processor Settings, Performance, or Advanced CPU Configuration.
On an Intel-based computer, look for Intel Hyper-Threading Technology or simply Hyper-Threading Technology. On many AMD systems, the corresponding setting is called SMT, SMT Mode, or Simultaneous Multithreading.
Do not assume that every computer will use these exact names. Firmware interfaces vary significantly between manufacturers and motherboard models.
If you cannot find the option, check your computer or motherboard documentation. Some manufacturers hide advanced CPU controls, and some systems do not allow users to change the setting.
Step 5: Disable Hyper-Threading or SMT
After locating the appropriate option, select it and change its value from Enabled to Disabled.
Take a moment to make sure you are changing the correct processor feature. Do not change settings such as CPU Ratio, Core Voltage, Turbo Boost, memory timings, or other performance controls unless you specifically know what they do.
Once Hyper-Threading or SMT is disabled, the processor will generally expose only its physical cores to Windows rather than exposing the additional logical processors created by simultaneous multithreading.
Step 6: Save the Firmware Changes
After disabling the setting, use the firmware’s Save and Exit option. Depending on the manufacturer, you may also be able to press a key such as F10 to save changes.
The computer should restart automatically. If you receive a confirmation message asking whether you want to save the changes, select the option to save and continue.
If you accidentally change another setting, do not continue making random changes. Carefully review the screen and, if necessary, choose the option to discard unwanted changes before exiting.
Step 7: Verify the Change in Windows
Once Windows starts, open Task Manager by pressing Ctrl + Shift + Esc. Select Performance > CPU.
Check the Cores and Logical processors values again. If Hyper-Threading or SMT was successfully disabled, the number of logical processors will commonly match the number of physical cores.
For example, a processor that previously showed 8 cores and 16 logical processors may now show 8 cores and 8 logical processors.
The exact result depends on your CPU architecture and firmware configuration, so do not rely on a particular number without checking your processor’s specifications.
You can also open Device Manager and expand Processors to see how Windows enumerates the processor. However, Task Manager is usually the simpler place to verify the logical processor count.
Step 8: Test Your Computer After the Change
After confirming the setting, use your computer normally and check whether the reason you disabled Hyper-Threading has been addressed. If you disabled it for troubleshooting, test the application or workload that originally caused the problem.
You may notice lower performance in multithreaded workloads, particularly when running demanding applications simultaneously. Everyday tasks such as web browsing and basic document editing may show little noticeable difference.
If performance becomes worse or the original issue is not resolved, you can return to the same BIOS or UEFI setting and enable Hyper-Threading or SMT again.
FAQs
Can I disable Hyper-Threading directly from Windows?
Usually, no. Windows can control how processors are scheduled and can limit processor usage in certain situations, but the actual Hyper-Threading or SMT hardware setting is normally controlled through BIOS or UEFI firmware.
Does disabling Hyper-Threading damage my CPU?
Normally, disabling Hyper-Threading or SMT does not damage the processor. It simply prevents the additional logical processors from being exposed to the operating system. You should still avoid changing unrelated voltage or overclocking settings without understanding them.
Why can’t I find Hyper-Threading in BIOS?
Your computer may use a different name, such as SMT, or the manufacturer may have hidden the setting. Some systems simply do not provide a user-accessible option to disable it.
Will disabling Hyper-Threading make Windows faster?
Not necessarily. In many everyday workloads, you may notice little difference. Some specialized workloads can behave differently, but disabling Hyper-Threading commonly reduces the processor’s ability to handle multiple threads efficiently.
Can I enable Hyper-Threading again?
Yes. Return to the same BIOS or UEFI processor settings, change Hyper-Threading or SMT back to Enabled, save the changes, and restart the computer.
Is Hyper-Threading the same as having extra CPU cores?
No. Logical processors are not the same as physical CPU cores. Hyper-Threading allows a physical core to expose additional logical processors, but those logical processors share resources within the physical core.
Bottom Lines
Disabling Hyper-Threading in Windows is slightly misleading because the actual setting is normally controlled outside Windows through your computer’s BIOS or UEFI firmware. The process is straightforward once you know where to look.
Start by checking your current Cores and Logical processors in Task Manager. Then enter UEFI or BIOS, locate Hyper-Threading or SMT, disable it, save the firmware changes, and restart Windows. Finally, check Task Manager again to confirm that the logical processor count changed as expected.
If you do not see the setting, do not change unrelated BIOS options. Your computer manufacturer may not provide access to this particular CPU feature.