When I started Up Unity For the first time, it does not want to start up I then left it there for 1 hour, and still nothing happened! What do I do? Please help. 
Quit Unity. The press the Alt key when you launch Unity. This should start Unity up in project wizard mode, where it’ll ask you for an existing project or let you create a new one.
That did not work Unity Does not respond.
Does that mean delete Unity
Reboot your machine. Then launch Unity by double-clicking it’s icon, and instantly press Alt.
I did what you said and all it does After 5 times is just closes.?