Your downloading is just starting kindly read this article too...
How to install ACCS
To run ACCS Microsoft .NET Framework 4 must installed on your PC.If you don't have it then ACCS setup will ask you to download and install it. In this tutorial i will demonstrate how to install ACCS if you don't have MS .NET 4 installed.If you already have MS .NET 4, then you will not bother with any further thing :) just click on installer and install.
Start:
Click on the ACCS setup.Now if you don't have MS .NET 4 then it will prompt
Now click on Yes then it will open this web page on your default browser. Now click on Download button and save it on your PC.
then click on MS .NET 4 setup file which you have just downloaded
Just accept the license then press install
after installation click on finish button
Now click on ACCS setup it should start installation
Now you can install ACCS on your PC ;)
Thanks for reading.