Timestamps (*) and assets (*) maps out of sync.
Asset 'C:/Program Files (x86)/Unity/Editor/Data/UnityExtensions/Unity/GUISystem/4.6.0/UnityEngine.UI.dll' is in timestamps but is not known in guidmapper...
Asset 'C:/Program Files (x86)/Unity/Editor/Data/UnityExtensions/Unity/GUISystem/4.6.0/Editor/UnityEngine.UI.dll' is in timestamps but is not known in guidmapper...
1.關閉UNITY
2.找到C:/Program Files (x86)/Unity/Editor/Data/UnityExtensions/Unity/GUISystem文件夾并拖出到桌面
3.啟動UNITY無法運行，并退出
4.強GUISystem文件夾拖回C:/Program Files (x86)/Unity/Editor/Data/UnityExtensions/Unity/
5.打開UNITY錯誤消除