Forum Discussion
Is this the Microsoft Windows Application Compatibility fix Database?
My Windows 11 25H2 laptop has an application called "Microsoft Windows Application Compatibility fix Database" that inexplicably appeared in "Settings" → "Applications". It was installed around 4 PM ...
This entry is a legitimate Microsoft-issued compatibility shim database, delivered via Windows Update out-of-band (not through a normal cumulative update).
It's tied to a specific fix Microsoft has been pushing out in late August 2026: the inpoutx64.sys driver — used by a lot of RGB lighting/peripheral software.
yeah but it caused more issues by having it, since deleting it... it is running as normal.
