1 2Sdb 3 4Sdb files are Shim Databases. 5They contain information about bad applications, and about the fixes that can be applied to them. 6 7 8Shims 9 10A shim is a piece of code that influences the process it's applied to. 11This can be done by calling certain api's, or by changing the behavior of api's. 12'DisableThemes' is an example of a shim that changes behavior by calling 'SetThemeAppProperties'. 13'Win95VersionLie' is an example of a shim that changes behavior, by intercepting calls to GetVersion[Ex]. 14 15Layers 16 17A layer is a collection (1..n) of shims. 18Layers are used to reference a collection of shims by name. 19 20 21