A housing of a computer includes a cover, a body, and a locking mechanism. The locking mechanism is mounted on the cover. The locking mechanism includes a handle and a sliding plate. The handle is configured to rotate between a first position and a second position relative to the cover. The handle is configured to push the sliding plate. When the handle is in the first position, the sliding plate is engaged with the cover and the body to fix the cover to the body. When the handle is in the second position, the sliding plate is away from the body and the cover is unlocked from the body.