am sure just trying to help here, because I was stumbling over this
exact issue a few mos.ago.
http://www.updatexp.com/scannow-sfc.html
recap that is truly important:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\Setup
You will see various entries here on the right hand side. The one we
want is called:
SourcePath
---------------------
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
NT\CurrentVersion\SourcePath
--------------------
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\Setup
\ServicePackSourcePath
This should be pointing to the location C:\WINDOWS\ServicePackFiles
(assuming C:\ is the boot drive.)
-------------------------------------------------------