方法 1
方法 1 的 2:解锁文件
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下载密码破解工具。如果需要密码才能打开Excel文件，那么只能使用密码破解程序来强行破解密码，然后才能打开文件。如果密码很复杂，并且文件是Excel 2007或更高版本，那么可能需要几周甚至数月才能破解它。
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研究来源
几乎所有密码破解工具都需要付费。如果安装了显卡，就能提高破解程序的处理能力，从而更快地破解密码。常用的破解程序包括：
Accent Excel Password Recovery
Rixler Excel Password Recovery Master
Excel Key
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在密码破解程序里载入Excel文件。密码破解程序通常能自动检测文件密码，并显示文件加密类型。
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开始破解密码。载入程序后，可以开始尝试破解密码了。有些程序允许你选择破解类型，你也可以直接使用默认设置。
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等待密码恢复程序找回密码。根据密码强度和计算机运行速度，破解进程可能会耗费几分钟到几个月不等。预计的剩余时间会显示在窗口中。
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方法 2
方法 2 的 2:解锁工作表/工作簿
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在电脑上找到Excel文件。如果Excel文件里的工作表或工作簿被密码保护，那么你可以编辑文件来解除密码。这个方法仅适用于被锁定的工作表和工作簿。你仍需要首先打开Excel文件。这个方法不能用来解锁被密码保护的文件。
这个方法适用于工作簿或工作表结构被锁定，但你又想编辑文件的情况。
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启用文件扩展名（如果没有启用的话）。你应该能在文件名的后面看到“.xlsx”扩展名。如果看不到任何扩展名，请在资源管理器窗口的“工具”菜单中选择“文件夹选项”，然后在“查看”选项卡里取消勾选“隐藏已知文件类型的扩展名”选框，这样就能启用扩展名。
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将“xlsx”扩展名更改为“zip”。Windows系统会提示你重命名文件可能会导致文件不可用。确认操作。
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右键点击ZIP文件，选择“全部解压缩”。这会在当前路径中创建一个新的文件夹，新文件夹与Excel文件同名。
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打开“xl”文件夹，然后选择“工作表”文件夹。这样会显示文档中所有的工作表。每个工作表都是独立的文件，如“sheet1.xml”。
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右键点击锁定的工作表，选择“编辑”。这会在记事本里打开锁定工作表的XML信息。
如果你尝试解锁整个工作表进行编辑，请返回“xl”文件夹，编辑“workbook.xml”文件。剩余的步骤也是相同的。
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按下Ctrl+F快捷键，打开查找窗口，搜索“sheetProtection”。你将能查看用来保护工作表或工作簿的算法信息。
如果你尝试解锁工作簿，可以搜索“workbookProtection”。
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选择里的所有所有内容。选择括弧里的所有内容，包括“sheetProtection”字样，然后删除它。保存文件，关闭记事本。
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复制编辑好的工作簿或工作表文件。选中编辑好的文件，按下Ctrl+C复制它。
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打开之前创建的ZIP文件。双击它打开文件。
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找到同名文件夹，里面有编辑好的工作表或工作簿。打开“xl”文件夹，然后打开“工作表”文件夹。你应该能在这里看到原始工作表文件。如果编辑了工作簿.xml文件，你应该能在“xl”文件夹里找到它。
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粘贴编辑好的文件，覆盖原始文件。按下Ctrl+V粘贴文件，覆盖原始文件。
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关闭ZIP文件，将扩展名重命名为“xlsx”。这会将ZIP 文件更改回Excel文件。
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打开文件，导入工作簿、工作表。然后，不输入密码你也能编辑工作簿了。[2]
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研究来源
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