Windows sfc

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Windows\system32>sfc /scannow

Beginning system scan.  This process will take some time.

Beginning verification phase of system scan.
Verification 100% complete.
Windows Resource Protection found corrupt files but was unable to fix some of th
em.
Details are included in the CBS.Log windir\Logs\CBS\CBS.log. For example
C:\Windows\Logs\CBS\CBS.log

C:\Windows\system32>
C:\Windows\system32>
C:\Windows\system32>
C:\Windows\system32>
C:\Windows\system32>.
'.' is not recognized as an internal or external command,
operable program or batch file.

C:\Windows\system32>
C:\Windows\system32>
C:\Windows\system32>
C:\Windows\system32>
C:\Windows\system32>
C:\Windows\system32>#
'#' is not recognized as an internal or external command,
operable program or batch file.

C:\Windows\system32>