在Windows 7中，你可以不用格式化化其他磁盘或分区，只格式化C盘。使用购买电脑附带的Windows 7的安装盘，可以格式化C盘并清除其中的设置 、文件和软件。为了格式化，你需要在插入Windows 7光盘之前，将C盘中的文件和程序备份到其他磁盘中。
步骤
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1
备份和保存文件。格式化C盘会抹除C盘中的所有文件、程序和信息，所以你需要将需要的文件都保存下来。
- 将文件保存到外部硬盘或光盘中，或者如果可能的话，还可以将文件保存到网上。
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2
如果可以的话，连网获取计算机名。C盘格式化后的安装过程中，你可能需要重新输入计算机名，来重新连入网络。
- 打开“开始菜单”，右键点击“计算机”，选择“属性”，在“计算机名称、域和工作组设置”中，你就能看到计算机名了。
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3
插入Windows 7安装盘。在某些情况下，Windows 7的安装程序可能在U盘中，U盘同样可以插入。
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4
关闭电脑。为了读取安装光盘中的内容，你的电脑会重新启动。
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5
打开电脑。当电脑重启之后，它会自动读取安装光盘中的内容，然后启动格式化进程。
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6
格式化C盘。电脑识别光盘之后，它会提示你按任意键继续。格式化助手会出现在屏幕中。
- 在“安装Windows”页面中，选择语言，然后点击“下一步”。
- 阅读和查看Windows 7的许可条款。为了进行下一步，你需要点击“我接受许可条款”前的复选框。
- 出现提示后，点击“自定义”，选择你想进行的安装类型。
- 出现提示询问你想将系统安装在哪里时，选择“驱动器选项（高级）”。选择这个选项，就可以只格式化C盘。
- 当系统询问你你想格式化哪个分区时，点击“C盘”。你的电脑会开始格式化，或抹除C盘的所有数据。格式化完成后，系统会提示你。
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7
在C盘上重装Windows 7。C盘格式化之后，你会被要求重新安装Windows 7。Windows提示你之后，点击“下一步”。Windows安装助手会继续运行安装进程。如果你的电脑联网，它还会提示你输入计算机名，以及其他信息，比如用户名。
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8
恢复备份文件。安装进程结束后，你就可以插入外置硬盘或光盘，恢复备份的文件了。
小提示
- 恢复C盘的文件之前，你可能需要联网。联网之后，系统会提示你为重装的应用和程序升级或下载新驱动。