2019-06-26 16:14:11:129 3648 1890 Handler Starting install of CBS update 33885B5D-A682-4787-98D9-5B87981FA026
2019-06-26 16:14:11:129 3648 1890 Handler CBS session identity: 30747689_1828718338
2019-06-26 16:14:11:176 3648 1890 Handler CBS package identity: Package_for_RollupFix~31bf3856ad364e35~amd64~~9600.19377.1.11
2019-06-26 16:14:11:176 3648 1890 Handler Installing self-contained with source=C:\Windows\SoftwareDistribution\Download\61d69f8080d809c58e0ef376a9633f3a\Windows8.1-KB4503276-x64.cab, workingdir=C:\Windows\SoftwareDistribution\Download\61d69f8080d809c58e0ef376a9633f3a\inst
2019-06-26 16:14:16:051 916 17b0 Report REPORT EVENT: {294E7496-70E0-433D-9527-24C0A3CC703B} 2019-06-26 16:14:11:051+0200 1 181 [AGENT_INSTALLING_STARTED] 101 {D7086DC7-6DA8-4D5A-9E76-69CBFEA6CD85} 501 0 wusa Success Content Install Installation Started: Windows has started installing the following update: Security Update for Windows (KB4503276)
2019-06-26 16:14:16:051 916 17b0 Report CWERReporter finished handling 2 events. (00000000)
2019-06-26 16:16:08:906 3648 ec4 Handler FATAL: CBS called Error with 0x800f0900,
2019-06-26 16:16:15:562 3648 1890 Handler FATAL: Completed install of CBS update with type=0, requiresReboot=0, installerError=1, hr=0x800f0900