What is main difference between windows and Linux HD

BASIS FOR COMPARISON LINUX WINDOWS Linux-Cost Free of cost Open source Yes Customization Yes Security More secure Booting Either primary or logical partition. Separation of the directories using Forward slash File names Case sensitive File system EXT2, EXT3, EXT4, Reisers FS, XFS and JFS Type of kernel used Monolithic kernel Efficiency Effective running efficiency Windows - Expensive Vulnerable to viruses and malware attacks. Only primary partition. Case insensitive FAT, FAT32, NTFS and ReFS Efficiency- Lower than Linux