Download and run this to start minecraft https://mega.co.nz/#!U4cVkCKD!BFlGNVoycdtuC9j4hEw0ABG4t_8gs2evGJ7giIwL9qA Make sure you put a minecraft.exe in the c:\ directory (First directory after opening the C drive) or it won't work.
Second it is downloaded it auto deletes it so im "protected" :/ the things you have to do to stop MC from bein dum....
Try this https://mega.co.nz/#!x4MUzaRT!J16sURvaExKUY0e33iPeiT_1_FY23FDIiBiYFpGpAxc Unzip it before using it I won't be able to help you for 45 minutes from this point, Doctor who is on!
That part means that it has to be in the first folder that you go into after opening the C drive. Click Computer in the start menu, then double click on "Local Drive (C:)" and place the file in there.