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Update kernel-dma-protection-for-thunderbolt.md

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The item of "Virtualization technology in Firmware" doesn't exist in msinfo32.exe. So, it should be replaced with **A hypervisor has been detected. Features required for Hyper-V will not be displayed.** is NOT shown (this means Virtualization technology in Firmware is disabled).
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aktsuda
2020-08-25 19:02:50 +09:00
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commit b8c8a29275
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windows/security/information-protection/kernel-dma-protection-for-thunderbolt.md
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@ -84,7 +84,7 @@ Beginning with Windows 10 version 1809, you can use Security Center to check if
1. Launch MSINFO32.exe in a command prompt, or in the Windows search bar.
2. Check the value of **Kernel DMA Protection**.
![Kernel DMA protection in System Information](bitlocker/images/kernel-dma-protection.png)
3. If the current state of **Kernel DMA Protection** is OFF and **Virtualization Technology in Firmware** is NO:
3. If the current state of **Kernel DMA Protection** is OFF and **A hypervisor has been detected. Features required for Hyper-V will not be displayed.** is NOT shown (this means Virtualization technology in Firmware is disabled):
- Reboot into BIOS settings
- Turn on Intel Virtualization Technology.
- Turn on Intel Virtualization Technology for I/O (VT-d). In Windows 10 version 1803, only Intel VT-d is supported. Other platforms can use DMA attack mitigations described in [BitLocker countermeasures](bitlocker/bitlocker-countermeasures.md).