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.sdb file extension

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Application compatibility database.

A .sdb file is a custom or system wide compatibility database found on Windows systems.

Whilst applications may have their own custom compatibility database (typically older applications), there are some system wide .sdb files maintained by Windows:

SysMain.sdb : Holds information and compatibility fixes.
AppHelp.sdb : Stores help messages that prompt users for patches, together with the corresponding URL.

These files are found in the %Windir%\AppPatch folder.

Can you add to this? Do you know of any applications not already listed which will work with .sdb files, view .sdb files or open .sdb files? Are you able to contribute any additional reference information or file format information about .sdb files or have you spotted any errors or omissions? If so please let us know by emailing us at feedback@cryer.co.uk - Thank you.