text: You can not convert a file system on a disk without reformatting it, which ever operating system you use. If you're running windows XP Home edition on a FAT 32 file system and want to change the file system to NTFS, you'll have to reformat your PC using a Windows XP CD, which will give you the option of formatting the disk with a specific file system. Personally, I don't advice running windows XP on a FAT 32 file system.