由于 Windows 很乱，我正尝试在我的计算机上安装 Ubuntu。
我看到的屏幕是：
Preparing to install Ubuntu
For best results, pleaase ensure that this computer:
(green check) has at least 4.6 GB available drive space
(green check) is plugged into a power source
(green check) is connected to the Internet
(checked) Download updates while installing
Ubuntu uses third part software...
(checked) Install this third-part software
Fluendo MP3 plugin...
当我点击“前进”时，收到以下消息：
The installer has detected that the following disks have mounted partitions:
/dev/sda/
Do you want the installer to try and unmount the partitions on these disks
before continuing? If you leave them mounted, you will not be able to create,
delete, or resize partitions on these disks, but you may be able to install
to existing partitions there.
我选择“是”，因为我不想弄乱任何 Windows 分区。
然后它就静止不动了。我看到“等待”图标，它旋转但没有做任何其他事情。我可以选择退出，但这是我唯一能做的。
有什么建议吗？这是硬盘问题吗？