Visual studio 2015, Web Form View / Designer - Error: class not registered looking for object with clsid

I've just installed VS 2015 Community on my PC (Win 10)

In the web form editor the Split tab is not active and Design freezes the window.

If I click - Menu / View / Designer the following error occures: class not registered looking for object with clsid {A53914B4-1C62-4D60-8E8D-C7B67B4DFF87}

I tried to fix and reinstall the VS but the result is the same.

Any Ideas???