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UpdatedJul 3, 2017, 11:55 am EST| 4 min read

Modern CPUs include hardware virtualization features that help accelerate virtual machines created in VirtualBox, VMware, Hyper-V, & other apps. But those features aren’t always enabled by default.

Virtual machines are wonderful things. With virtualization apps, you can run an entire virtual computer in a window on your current system. Within that virtual machine, you can run different operating systems, thử nghiệm apps in a sandbox environment, và experiment with features without worry. In order to lớn work, those virtual machine apps need hardware acceleration features built into modern CPUs. For hãng sản xuất intel CPUs, this means hãng sản xuất intel VT-x hardware acceleration. For AMD CPUs, it means AMD-V hardware acceleration.

RELATED: Beginner Geek: How to lớn Create & Use Virtual Machines

At some point, you may encounter error messages in your VM apps like the following:

VT-x/AMD-V hardware acceleration is not available on your systemThis host supports hãng sản xuất intel VT-x, but hãng sản xuất intel VT-x is disabledThe processor on this computer is not compatible with Hyper-V

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These errors can pop up for a couple of different reasons. The first is that the hardware acceleration feature may be disabled. On systems with an intel CPU, the hãng sản xuất intel VT-x feature can be disabled via a BIOS or UEFI firmware setting. In fact, it’s often disabled by default on new computers. On systems with an AMD CPU, this won’t be a problem. The AMD-V feature is always enabled, so there’s no BIOS or UEFI setting to change.

The other reason these errors can pop up is if you’re trying to use a virtualization app lượt thích VMWare or VirtualBox when you already have Microsoft’s Hyper-V installed. Hyper-V takes over those hardware acceleration features và other virtualization apps won’t be able lớn access them.


So, let’s take a look at how khổng lồ fix these issues.

Try Uninstalling Hyper-V

If you have Hyper-V installed, it gets greedy and won’t let other virtualization apps access hardware acceleration features. This more often happens with hãng intel VT-x hardware, but can also happen with AMD-V on occasion. If this is the case, you’ll see an error message in your virtualization phầm mềm to the effect that hãng sản xuất intel VT-x (or AMD-V) is unavailable, even though it is enabled on your computer.

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To solve this problem, you just need lớn uninstall Hyper-V. Hyper-V is an optional Windows feature, so uninstalling it is a little different than uninstalling a regular app. Head khổng lồ Control Panel > Uninstall a Program. In the “Programs & Features” window, click “Turn Windows features on or off.”


In the “Windows Features” window, clear the “Hyper-V” checkbox and then click “OK.”


When Windows is done uninstalling Hyper-V, you’ll need khổng lồ restart your PC và then you can try using VirtualBox or VMware again.

Turn intel VT-x On in Your BIOS or UEFI Firmware

If you have an hãng sản xuất intel CPU và uninstalling Hyper-V didn’t solve your problem—or your virtualization app reported that hãng sản xuất intel VT-x was disabled—you’ll need lớn access your computer’s BIOS or UEFI settings. PCs made prior to the release of Windows 8 probably use BIOS. PCs made after Windows 8 came out may use UEFI instead, and the likelihood of using UEFI grows the more modern the PC.

On a BIOS-based system, you’ll access BIOS settings by restarting your PC & pressing the appropriate key right when it first boots. The key you press depends on your PC’s manufacturer, but it’s often the “Delete” or “F2” key. You also will most likely see a message during startup that says something lượt thích “Press Key lớn access setup.” If you can’t figure out the right key khổng lồ get into your BIOS settings, just perform a web tìm kiếm for something lượt thích “computer model_number access BIOS.”


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On a UEFI-based computer, you can’t necessarily just press a key while the computer is booting. Instead, you’ll need khổng lồ follow these instructions khổng lồ access the UEFI firmware settings from the Windows advanced startup options. Hold down the Shift key as you click Restart in Windows khổng lồ reboot straight to that menu.


Whether your PC uses BIOS or UEFI, once you’re in the settings menu, you can begin looking around for an option labeled something lượt thích “Intel VT-x,” “Intel Virtualization Technology,” “Virtualization Extensions,” “Vanderpool,” or something similar.


Often, you’ll find the option under a “Processor” submenu. That submenu may be located somewhere under a “Chipset,” “Northbridge,” “Advanced Chipset Control,” or “Advanced CPU Configuration” menu.

Enable the option and then select “Save & Exit” or the equivalent feature lớn save your settings changes and reboot your PC.

After the PC restarts, you can try using VirtualBox or VMware again.

What to do If You Don’t See the hãng sản xuất intel VT-x Option in BIOS or UEFI

Unfortunately, some máy tính manufacturers và motherboard manufacturers don’t include an option in their BIOS or UEFI settings for enabling hãng intel VT-x. If you don’t see the option, try performing a web search for the model number of your laptop—or your motherboard, if it’s a desktop PC—and “enable intel VT-x”.

RELATED: How to kiểm tra Your Motherboard model Number on Your Windows PC

In some cases, manufacturers may later release a BIOS or UEFI firmware update that includes this option. Updating your BIOS or UEFI firmware might help—if you’re lucky.

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And, remember—if you have an older CPU, it may not support the hãng intel VT-x or AMD-V hardware virtualization features at all.