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安裝西門子s7-200編程軟件時提示 Unable to locate a valid executable for update, you must select the directory where your previous version of Micro/win or Micro /Dos is located
怎么搞定。謝謝！！

曾經安裝過，并且未正常卸載造成的。
可以搜索注冊表并刪除有關項解決。