How to know exactly why SQL SERVER 2014 Express installation failed? I downloaded ExpressAndTools 64BIT\SQLEXPRWT_x64_ENU.exe from Microsoft. When I tried to install it I get the following error: 



But it does not say exactly what I have missing.

My environment is configured as follows:


Windows 7 Ulitimate 64 bits
4 GB of RAM and enough HDD space
Intel i3 processor (enough for SQL SERVER 2014)
.Net 3.0, 3.5, 4.0 installed on my computer


Still it says something is wrong without even telling me what.

How to solve that issue?
If you can open the SQL Server Installation Center with this installer it will give you a lot of useful info. 

In the Planning section you can find the Hardware &amp; Software requirements. Or: https://msdn.microsoft.com/en-us/library/ms143506(v=sql.120).aspx