.net framework 4.5.1 will not install error: 0x80240017

[matbrains]

Can anyone help with this? i've just bought arma 3 and it won't launch without .net 4.5.1, but it doesen't install and just throws random error logs at me.

OS Version = 6.2.9200, SP = 0.0, Platform 2
OS Description = Future OS - x64 Unkonw Edition (ProductType=101)
MSI = 5.0.9200.17150
Windows servicing = 6.2.9200.17074
CommandLine = C:\39205b212cdff2a16dad\\Setup.exe /x86 /x64 /redist
TimeZone = GMT Summer Time
Initial LCID = 2057
Using Simultaneous Download and Install mechanism
Operation: Installing
Package Name = Microsoft .NET Framework 4.5.1 Setup
Package Version = 4.5.50938
User Experience Data Collection Policy: Disabled
Number of applicable items: 6
Exe (C:\39205b212cdff2a16dad\SetupUtility.exe) succeeded.
Exe Log File: dd_SetupUtility.txt
Exe (C:\39205b212cdff2a16dad\SetupUtility.exe) succeeded.
Exe Log File: dd_SetupUtility.txt
Exe (C:\39205b212cdff2a16dad\Windows8-RT-KB2881468-x64.msu) failed with 0x80240017 - (null).
Exe (C:\39205b212cdff2a16dad\Windows8-RT-KB2881468-x64.msu) failed with 0x80240017 - (null).
Exe (C:\39205b212cdff2a16dad\Windows8-RT-KB2881468-x64.msu) failed with 0x80240017 - (null).
Exe (C:\39205b212cdff2a16dad\Windows8-RT-KB2881468-x64.msu) failed with 0x80240017 - (null).
Exe (C:\39205b212cdff2a16dad\Windows8-RT-KB2881468-x64.msu) failed with 0x80240017 - (null).
Exe (C:\39205b212cdff2a16dad\Windows8-RT-KB2881468-x64.msu) failed with 0x80240017 - (null).
Exe (C:\39205b212cdff2a16dad\Windows8-RT-KB2881468-x64.msu) failed with 0x80240017 - (null).
Final Result: Installation failed with error code: (0x80240017) (Elapsed time: 0 00:01:12).

I can't find anywhere how to fix this, and the microsoft support doesen't help either.