Deschidem notepad si copiem urmatoarele linii:

reg delete HKLMSoftwareMicrosoftSilverlight /f
reg delete HKEY_CLASSES_ROOTInstallerProductsD7314F9862C648A4DB8BE2A5B47BE100 /f
reg delete HKEY_LOCAL_MACHINESOFTWAREClassesInstallerProductsD7314F9862C648A4DB8BE2A5B47BE100 /f
reg delete HKEY_CLASSES_ROOTTypeLib{283C8576-0726-4DBC-9609-3F855162009A} /f
reg delete HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionApp Pathsinstall.exe /f
reg delete HKEY_CLASSES_ROOTAgControl.AgControl /f
reg delete HKEY_CLASSES_ROOTAgControl.AgControl.5.1 /f
reg delete HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionUninstall{89F4137D-6C26-4A84-BDB8-2E5A4BB71E00} /f
rmdir /s /q “%ProgramFiles%Microsoft Silverlight”
rmdir /s /q “%ProgramFiles(x86)%Microsoft Silverlight”

Salvam fisierul cu extensia “.cmd” ( ex. : silverlight.cmd ).

Rulam fisierul cu drepturi de administrator: click dreapta si “Run as administrator”.

Reluam procesul de update.