Using a new computer Hp Pavilion (17-f283) with a graphic card Intel HD 5500, when i load in Krita any image (tiff format), the main window is desesperately black ! Ave you any idea how to solve this problem ?

That is strange, there should have been a little warning window popping up for Intel users on windows to tell them to update their graphics drivers if they saw the bug you are seeing. Did you not get this window?

Anyway, if you update your graphics drivers this issue should be fixed.