Corrupted textures

I play minecraft at one time, with no problem, until I go in normally, and then the texture pack of the skin appears corrupted (Black, with arms and legs missing). I wondered and then went into my world, which corrupts the textures of Mobs, Banners, Heads of Mobs, etc. How can I solve this problem? My computer is not so new, but before long Minecraft Windows 10 Edition ran normally.