D Dineria Member Joined Oct 19, 2019 Posts 17 Oct 19, 2019 #1 Hi everyone! This forum was recommended to me by a friend as I'm having trouble with my Windows updates on my Acer notebook (Win 8.1, 64 Bit): It started with the monthly security update KB4507448, then KB4512488 and now KB4521864. They were downloaded and installed, but then I was told the update doesn't finish and changes are reversed. This happened every time, no matter what I try... (For example manual download from the Microsoft Update Catalog, following the Microsoft Support recommendations, FixWindowsUpdate or Reset Windows Update Agent.) It seems, this is only happening with KB-Updates: Other updates (Net-Framework for example) are not affected and finish when installed seperatly. I also tried Windows own troubleshooting: It notices that updates couldn't be installed, but can't fix this... There are no USB-devices connected, I disabled the virus scanner for the moment and optimised the RAM, but nothing did solve the problem... I also tried the System File Checker with sfc/scannow: It found damaged files, but couldn't fix them. Further infos were put into a CBS.log-file: For my troublesome updates it says: CBS Read out cached applicability from TiLight for package: KB4507448-MappingPackage~31bf3856ad364e35~amd64~~9600.19401.1.9, ApplicableState: 0, CurrentState:0 CBS Read out cached applicability from TiLight for package: KB4512488-MappingPackage~31bf3856ad364e35~amd64~~9600.19431.1.5, ApplicableState: 0, CurrentState:0 My friend then showed me this thread on the forum which looks a lot like my problem: [SOLVED] - Update doesn't finish, changes are being reversed (Win8.1) I tried to add the recommended packages, but got the error "invalid INF-file was commited as parameter" every time... (There's nothing for me to choose from, too...) I stayed away from the actions recommended to the thread-starter only. Thanks for your help!