Horizon don't launching

when I try to run horizon , there is the logo wait 5 seconds and closes the program , do not know what to do , help

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cpu rises to 50% above and then lowered to 7% and crash process
net framework 3.5.1, 4.6
3.5 cannot be installed on windows 7

p.s i have windows 7 ultimate x64

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I tried to install the framework 3.5, he wrote, use the “Enable or disable components windows” I tried everything zero effect
and how to remove framework 3.5

Only here framework 3.5.1 standard for windows 7
it was established framework 4.6