After getting so irritated with this Silverlight problem, I have lastly established a solution, as a minimum for my windows 7 laptop
- I could not obtain it installed. Failure could not situate wanted files below "c:\4981403e3485612c9426" or something same.
- Removing the .msi and other files physically to that place, at a standstill not installing.
- Later than running those uninstall package utility offered by Microsoft, reviving / re-install of Silverlight, at a standstill botched installation.
Lastly, I did a bit registry look. Opened up registry(later than backup!) did a investigate for "silverlight.msi" and establish it in the following key:
I erased that key, and as well removed all Silverlight folders in programdata and program files regenerated, started the silverlight.exe. It installed with no trouble and it works! Finally.
HKEY_CLASSES_ROOT / installer / products / D9313F9862C649A4CB8BE2A4B47BD100