Enhanced Write Filter (or EWF) is a component of Windows XP Embedded and Windows Embedded Standard 7 which stores volume changes on another medium instead of applying them to the original volume. EWF allows the writes to be discarded or committed to the original volume later (either directly or through inaction based on the configuration). As this minimizes writes to a specified hard disk, EWF and FBWF (File-Based Write Filter) have become popular in enthusiast computing as a way of decreasing wear of solid-state drives on netbooks and CarPCs.