QQ安装的时候 提示 nsis error

全部提示框是这样的:

nsis error
the installer you are trying to use is corrupted or incompllete.
this could be the result of this installer to obtain a new copy.
it may be possible to skip this check using the /NCRC command line switch
(NOT RECOMMENDED)

英文意思:运行一个用Nullsoft Scriptable Install System (NSIS)建立的程序常会发生这种错误,起因可能是下载来的文件不完整,或存放该程序的磁盘区坏了,也可能因病毒.无论何种原因,建议你联系程序的作者,重新下载,再安装. 或命令行中附加参数 /NCRC 试试安装.(不推荐此法).
NSIS 错误
你正使用的安装程序已经被破坏或不完整。 这可能是由于损坏的磁盘，或是下载失败，或是病毒导致的结果。你可以联系本安装程序的程序员来获取新的软件拷贝。

首先你可以在命令行下面安装文件，只不过要带上"/NCRC"这个开关(开关必须大写)。正如警告说的：不推荐你这么做，因为一般来说也不会这样就让你顺利安装的。

找到了比较具体的解决办法：

Error with Single Installer
Disable any download accelerators and download the installer again.
Update any active anti-virus and download the installer again.
Disable any active anti-virus and download the installer again.
Download the installer from another source. It might be corrupted on the server, or the connection to the server is unreliable.
Download the installer using another computer and copy it to the original computer using a reliable media.

Error with Multiple Installers
Disable any download accelerators and download the installer again.