login problem in Mojang

Hi, I was reporting because I wanted to report a problem.

I have already a little time since I bought minecraft, but there is a problem, I can not login to download the launcher, so I can not play.

It is not a problem of mail or password, I have logged in from other devices and it lets me enter perfectly without any kind of problem, so I do not know if the error is associated with my computer. The detail is that when I put my email and password and I click on start, nothing happens, not even a load icon appears, there is simply no action, which I would like to help me solve this error.
 Please help me