![one hard drive mac and pc dual boot one hard drive mac and pc dual boot](https://i0.wp.com/9to5mac.com/wp-content/uploads/sites/6/2020/07/Windows-installed-on-an-external-SSD-running-on-MacBook-Pro.jpg)
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In the Run dialog type msinfo32.exe and press Enter.
![one hard drive mac and pc dual boot one hard drive mac and pc dual boot](https://www.newegg.com/insider/wp-content/uploads/2018/11/SSD-WIndows.jpg)
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x86_64 Windows boot in x86_64 UEFI mode and 32-bit Windows boot in IA32 UEFI mode. Up to Windows 10, the firmware bitness matches the bitness of Windows, ie.
One hard drive mac and pc dual boot windows 7#
Very few recent systems pre-installed with Windows 7 are known to boot in x86_64 UEFI/GPT mode by default.