There may be many causes for the failure of some file of Windows OS, but most of the causes are as follows:
biocpl.dll: Download biocpl.dll File
BitsProvider.dll: Download bitsprovider.dll File
bitsiissetup.exe: Download bitsiissetup.exe File
blbsrv.dll.mui: Download blbsrv.dll.mui File
blbsrv.dll: Download blbsrv.dll File
binlsvc.dll.mui: Download binlsvc.dll.mui File
BioCredProv.dll: Download biocredprov.dll File
BitLockerWizard.exe.mui: Download bitlockerwizard.exe.mui File
BitLockerWizardElev.exe.mui: Download bitlockerwizardelev.exe.mui File
baaupdate.exe.mui: Download baaupdate.exe.mui File
BdeAducExt.dll.mui: Download bdeaducext.dll.mui File
BdeHdCfg.exe.mui: Download bdehdcfg.exe.mui File
BdeHdCfgLib.dll.mui: Download bdehdcfglib.dll.mui File
BdeAducExt.dll: Download bdeaducext.dll File
BdeUnlockWizard.exe: Download bdeunlockwizard.exe File
BioCredProv.dll.mui: Download biocredprov.dll.mui File
bdesvc.dll.mui: Download bdesvc.dll.mui File
baaupdate.exe: Download baaupdate.exe File
bderepair.dll: Download bderepair.dll File
BdeHdCfg.exe: Download bdehdcfg.exe File
BdeHdCfgLib.dll: Download bdehdcfglib.dll File
BdeUnlockWizard.exe.mui: Download bdeunlockwizard.exe.mui File
BitLockerWizardElev.exe: Download bitlockerwizardelev.exe File
bdesvc.dll: Download bdesvc.dll File
BdeUISrv.exe: Download bdeuisrv.exe File
bdeui.dll: Download bdeui.dll File
Brmf3wia.dll.mui: Download brmf3wia.dll.mui File
Brmf3wia.dll: Download brmf3wia.dll File
BrUs2Sti.dll: Download brus2sti.dll File
bootmgr.exe: Download bootmgr.exe File