Okay, I've downloaded and installed Windows6.1-KB947821-v25-x64.msu
Based on system info below....
OS Name Microsoft Windows 7 Professional
Version 6.1.7600 Build 7600
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name LOWELLXPS-PC
System Manufacturer Dell Inc.
System Model XPS L501X
System Type x64-based PC
Processor Intel(R) Core(TM) i7 CPU Q 740 @ 1.73GHz, 1734 Mhz, 4 Core(s), 8 Logical Processor(s)
BIOS Version/Date Dell Inc. A07, 3/29/2011
SMBIOS Version 2.6
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume2
Locale United States
Hardware Abstraction Layer Version = "6.1.7600.16385"
User Name LowellXPS-PC\Lowell XPS
Time Zone US Mountain Standard Time
Installed Physical Memory (RAM) 6.00 GB
Total Physical Memory 5.93 GB
Available Physical Memory 3.73 GB
Total Virtual Memory 11.9 GB
Available Virtual Memory 8.83 GB
Page File Space 5.93 GB
Page File C:\pagefile.sys
It installed normally..
Then trying to run "sfc /scannow" I get the following.
Running with /scannow shows the program is installed but there seems to be a problem when the /scannow option is added.
Hope this info helps.