如果你不符合条件的，例如，如果你有未分配系统分区磁盘空间，安装程序试图利用现有的启动文件系统分区。
If you do not meet the conditions, such as if you do not have unallocated disk space for a new system partition, setup attempts to use the existing system partition for boot files.
最初，稀少文件是一个基础上是空的文件，其中包括没有用户数据和尚未分配的磁盘空间，为用户数据。
Initially, a sparse file is an essentially empty file that contains no user data and has not yet been allocated disk space for user data.
如果你不符合条件的，例如，如果你有未分配系统分区磁盘空间，安装程序试图利用现有的启动文件系统分区。
If no partition is currently marked active, setup sets one as active using the same process applied by Windows Vista setup previously.
如果你不符合条件的，例如，如果你有未分配系统分区磁盘空间，安装程序试图利用现有的启动文件系统分区。
If no partition is currently marked active, setup sets one as active using the same process applied by Windows Vista setup previously.
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