I am running Windows 8.1. Below are my do-not-install list of MS updates which causes weird behavior to the mouse cursor in vsphere client.
Hope this helps.
KB2973201
KB2993651
KB3002885
KB2962409
KB2967917
KB2975719 (This would install KB2993651)
KB2984006 (This would install KB2994897)
KB3000061
Jimmy