Go to:
http://www.microsoft.com/net/download
And select the download option depending on if your system is x86 och x64 (I recommend downloading the full installer instead of the web install)
.NET Framework 4 Client Profile
for x86 ›
.NET Framework 4 Client Profile
for x86 & x64 ›
Good luck!
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i7 2600k @ 4.5 | GTX580 1.5GB (latest drivers) | P8Z77-V Pro MB | 8GB DDR3 1600 Mhz | SSD (OS) + Raptor 150 (Games) + 1TB WD (Extra) | X-Fi Fatality Pro (PCI) | Windows 7 x64 | TrackIR 4 | G940 Hotas
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