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Editorial Team
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Asked: 2026-05-18T06:51:43+00:00

I have created a simple silverlight control. When I view the control in browser,

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I have created a simple silverlight control. When I view the control in browser, it asks me to install Silverlight (whereas it is already there on my machine). and when I still go ahead and install silverlight, it says Cannot install, same version of Silverlight already exists.
Whats wrong??

Thanks!!

EDIT: Uninstalled and reinstalled it.. and it worked.. but still wondering what must be the issue??

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1 Answer

  1. Editorial Team

    I ran into this issue a few months back. It has something to do with the registry. I had to use subinacl along with a script to fix this issue. I would recommand uninstall and reinstall the latest silverlight, and then use subinacl and apply the following in a windows batch file:

    subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl /grant=administrators=f 
subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl /grant=users=f 
subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl /grant=system=f

subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl\CLSID /grant=administrators=f 
subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl\CLSID /grant=users=f 
subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl\CLSID /grant=system=f

subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl.2.0 /grant=administrators=f 
subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl.2.0 /grant=users=f 
subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl.2.0 /grant=system=f 

subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl.3.0 /grant=administrators=f 
subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl.3.0 /grant=users=f 
subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl.3.0 /grant=system=f

subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl.4.0 /grant=administrators=f 
subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl.4.0 /grant=users=f 
subinacl /subkeyreg HKEY_CLASSES_ROOT\AgControl.AgControl.4.0 /grant=system=f

subinacl /subkeyreg HKEY_CLASSES_ROOT\VisualStudio.vbproj.9.0 /grant=administrators=f
subinacl /subkeyreg HKEY_CLASSES_ROOT\VisualStudio.vbproj.9.0 /grant=users=f
subinacl /subkeyreg HKEY_CLASSES_ROOT\VisualStudio.vbproj.9.0 /grant=system=f
subinacl /subkeyreg HKEY_CLASSES_ROOT\VisualStudio.csproj.9.0 /grant=administrators=f
subinacl /subkeyreg HKEY_CLASSES_ROOT\VisualStudio.csproj.9.0 /grant=users=f
subinacl /subkeyreg HKEY_CLASSES_ROOT\VisualStudio.csproj.9.0 /grant=system=f

    you can download subinacl here Subinacl

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