How to check:
1. Press Windows + R.
2. Type "msinfo32" and press Enter.
3. Look for Kernel DMA Protection. It must say ON.
How to enable (BIOS) - Intel:
1. Restart the PC and enter BIOS (usually Delete or F2).
2. Look in CPU Configuration, Chipset Configuration, or Advanced Settings.
3. Enable VT-D.
4. Save and exit BIOS.
How to enable (BIOS) - AMD:
1. Enter BIOS.
2. Look in Advanced, CPU Configuration, AMD CBS, or Chipset.
3. Enable AMD-Vi or IOMMU.
4. Save and exit BIOS.
What to do if these options are missing?
1. Press Windows + R.
2. Type "optionalfeatures".
3. Enable Virtual Machine Platform and Windows Hypervisor Platform.
4. Click OK, restart your PC, and check BIOS again.
What happens if it says "Unavailable"?
You won't be able to enable it at all, since your hardware might be too old to support it.