Does Windows 8 need to be installed on an NTFS partition or does it just like to be on one?
If I installed it on NTFS and then copied all its files on to a FAT32 partition would it work or would it throw a tantrum and refuse to work?
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Besides, allowing users to install to FAT/FAT32 in previous versions provided a false sense of security, since these filesystems do not support access control. Remember that one of the much-touted features of Vista was increased security.
Windows Vista and higher won't install to FAT32, and can only be installed to an NTFS partition. This is probably due to the use of symlinks, which is not supported in FAT32.
As for copying files, thats a no. Windows needs to be installed in order for the installer to configure your boot order properly. Just copying files won't do it.