Microsoft promises to optimize the amount of disk space that Windows 7 will consume in comparison to Windows Vista. Essentially, the Redmond company is laboring to decrease the installation footprint of the operating system with the next iteration of the Windows client. While the software giant failed to indicate just how much occupied disk space it was going to shave off in Windows 7, it did inform that it was looking to have Windows Vista beat in this aspect.
Ever wondered why the Windows SxS directory (%System Root%\winsxs) in your Vista is occupying more disk space? E7 blog has come up with an explanation about the Windows SXS directory and why it consumes huge disk space.
Source: Engineering Windows 7, Softpedia
