Please add spaces between words: sfc_os.dllmissing/notfounderror:UnavoidablyPCmaygetinfectedbyviruslikeTrojan:Win32/Delf.ITorcontrolledbymalwarelikeFix-itUtilitiesProfessional11.AftertheyareremovedbyantivirussuchasKasperskyInternetSecurity2012,theinfectedfilesfc_os.dllwouldbedeletedaswellsothatmissingproblemisfound.
sfc_os.dll missing / not found error: Unavoidably PC may get infected by virus like Trojan:Win32/Delf.IT or controlled by malware like Fix-it Utilities Professional 11. After they are removed by antivirus such as Kaspersky Internet Security 2012, the infected file sfc_os.dll would be deleted as well so that missing problem is found.