打开AutoCAD弹出致命错误UnhandledAccessViolationReading0×0000Exceptionat601790h是因为你的电脑启用了数据执行保护，没有给CAD软件权限，解决步骤如下：
1丶右键此电脑，选择属性。
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2丶点击高级系统设置。
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3丶点击性能中的设置按钮。
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4丶切换到数据执行保护标签，鼠标点选为除下列选定程序之外的所有程序和服务启用DEP回车确定即可。
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