Hi,
Thanks for posting in Microsoft TechNet forums.
Here is an article which might be useful regarding troubleshooting this issue:
Installing .Net 3.5 Fails on Windows 8 With 0x800F0906 Error
http://www.aidanfinn.com/?p=13351
(Note: Since the site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)
Regards
Kevin
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