How can I download and install .NET FRAMEWORK which is free of virus

Thank you in advance for your explanation.I was given a tranlation software, LEAF.When I tried to install it , it asked me to install .NET FRAMEWORK 4. I downloaded it and saved it in my CD.Then I downloaded it from the CD and tried to install it.When I use Window 7 ultimate 32 bit , it said after some minutes of installing progress 'installation failed' .When I used other computers, I was again asked to install windows imaging component(wic).I downloaded it.But when I tried to install it, it repeatedly said,'installation failed'.In addition, I fear that I may download the.NETFRAMEWORK 4 or WIC whic has been infected by virus.
Would you explain for me please what the .NETFRAMEWORK 4 and WIC (windows imaging component) are and how I can download and install .NET FRAMEWORK and WIC which are free of virus ?

Hello nurhussen and welcome to Seven Forums.

These two Microsoft articles explain what NET Framework and WIC are. They also provide malware free download links.

Download: Microsoft .NET Framework 4 (Web Installer) - Microsoft Download Center - Download Details

Download: Windows Imaging Component - Microsoft Download Center - Download Details

I'm not familiar with the LEAF translation software you mentioned. You might look into some of the other free translation tools that run in your browser and don't use NET Framework.

Bing Translator

Google Translate

Thank you, marsmimar, for your fast and satisfactory response.

Thank you,logicearth, for your fast and satisfactory answer.