Both errors are 0xEA: THREAD_STUCK_IN_DEVICE_DRIVER
A device driver problem has caused the system to pause indefinitely (hang). Typically, this is caused by a display driver waiting for the video hardware to enter an idle state. This might indicate a hardware problem with the video adapter, or a faulty video driver.
Both cite the ATI driver ativvaxx.dll as your issue. It is a module belonging to the ATI Radeon Video Acceleration Universal Driver program.