Control.exe error

Inspiron 530

Running Vista Home Basic SP1

When trying to open Control panel from the Start, Programs Menu, or
right click on Computer to go to System Properties, I get the following
message in a small window:

Control.exe

shdocvw.dll not found - reinstalling may fix the problem

The shdocvw.dll file is in Windows\system32 directory , but I cannot
replace it nor delete it even in safe mode.It says I don't have
permission to edit, rename it, or delete it.
I am also getting a window when I right click on Computer and try to go
to Properties/System properties.It says Control.exe - unable to locate
component.Application failed to start, SHDOCVW.DLL was not found. The
size of the SHODCVW.DLL is 1034KB

The system is clean otherwise. I have run a complete Avast Antivirus
scan, Malwarebytes scan, Hijackthis, and Windows Defender scan.


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sungod76