Original sentence: Later versions could be installed on a FAT32 partition gaining speed at the expense of security, but this option is no longer present since Windows Vista.NT also allows for other installable file systems, and with versions 3.1 and 3.51, NT could also be installed on DOS's FAT or OS/2's HPFS file systems
Edited sentence: Later versions could be installed on a FAT32 partition, in select cases, gaining speed at the expense of security, but this option is no longer present since Windows Vista.Windows NT also allows for other installable file systems, and with versions 3.1 and 3.51, NT could also be installed on DOS's FAT or OS/2's HPFS file systems