How can I fix error 0x80073712 for .NET 3.5 install on Windows 8 due to corrupt files?

William FrancisDirkes asked on
My computer shut down during download/install of .NET 3.5 for Windows 8 and now the files are corrupt. Every time an app needs .NET 2 - 3.5, it asks if I want to install these features. I click "yes" but every time it tells me the "component store has been corrupted." It doesn't tell me where the files are located, and when I click "Tell me how to solve this problem" the button doesn't do anything!

I've searched Google and my computer to try and find the files and delete them, but I can't. I tried enabling .NET 3.5 as a feature on my computer as per some other threads but the exact same error message as described above shows up, without any help for how to fix the problem. I will be reverting to Windows 7 if this isn't an easy fix.
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RPFerg replied on

I should add that the error message says: 
The following feature couldn't be installed:
.NET Framework 3.5 (includes >NET 2.0 and 3.0)
The component store has been corrupted
re: error code: 0x80073712
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