.net framework 3.5 not installing

so I've been trying for a couple of days now to get .NET 3.5 to install. Usually it gets all the way there and then I get the error code 0x800736CC
I've tried everything that the microsoft website suggested to solve the problem, EXCEPT change the group policy. And that is only because I don't have it. Group Policy editor only comes with Win8Pro, which I do not have (Nor do I want to spend 160 euros on because honestly windows 8 is not my favourite thing at this point).


A little extra info:
I had .NET 3.5 a couple months ago, but I sent my computer in to get a new part. When it came back my computer was wiped clean and I didn't have it anymore.

anyone have any suggestions? I am beyond frustrated at this point.

That error means "ERROR_SXS_FILE_HASH_MISMATCH", so it might be important to tell us exactly how you're attempting to install .NET 3.5, from what installation media, and potentially post a CBS.LOG file here (from \Windows\Logs) so we can have a look if you're doing everything else properly.

Try by DISM

vrosa said:

Try by DISM

Click to expand...

That is one of the first things I did

cluberti said:

That error means "ERROR_SXS_FILE_HASH_MISMATCH", so it might be important to tell us exactly how you're attempting to install .NET 3.5, from what installation media, and potentially post a CBS.LOG file here (from \Windows\Logs) so we can have a look if you're doing everything else properly.

Click to expand...

I think I am downloading it directly from windows. Even when I try to install it from the internet, it goes through windows.

Do you happen to have a Windows Server 2012 ISO handy? If so, you can mount it and use it's SxS directory under sources to install .NET3.5 on a Win8 machine (I have run into this before, and using 2012 as a source usually works):