I have situasion like this. (I have ati radeon x550)
i siple reboot pc in safe mode and remove some ati driver (in add/remove) after uninstal hydravision (this be one part of ati driver) PC normal starting without problems (after that i need install video driver, but this be better than reinstall windows
i siple reboot pc in safe mode and remove some ati driver (in add/remove) after uninstal hydravision (this be one part of ati driver) PC normal starting without problems (after that i need install video driver, but this be better than reinstall windows