帮多译一下，谢谢了

[MSDN123]

"VC Package not available or not registered"
This behavior can occur even after what appears to be a successful installatio
n.
CAUSE
This behavior seems to occur because the Windows Installer does not register T
LBs and DLLs if the installer finds that these items already exist. In most ca
ses, a previous version of Visual Studio .NET causes this behavior, even if th
e previous installation was under a different operating system.
RESOLUTION
To resolve the problem, run the Visual Studio .NET repair. A repair is more ef
fective for fixing this issue because the repair process forces registration o
f items that are not re-registered during an install.

To run the repair, follow these steps:
On the Start menu, point to Settings, click Control Panel, and then click Add/
Remove Programs.
On the list of installed programs, click Visual Studio .NET, and then click Ch
ange.
Click the second item in the 1 2 3 Visual Studio Setup dialog box.
Click Repair/Re-install, and then follow the onscreen instructions.
MORE INFORMATION
Steps to Reproduce the Behavior
To reproduce the problem, it is best to have two operating systems installed o
n separate partitions. Two installations of Windows XP Professional will work.

Install Visual Studio .NET under one operating system.
Install Visual Studio .NET under the other operating system; change the defaul
t location to match the installation location of the first installation.
Both installs report as successful.
Start the copy of Visual Studio .NET that you installed in step 2.
This type of installation is never recommended. Even if the installation selec
tions are exactly the same, and you can save disk space by performing this typ
e of installation, the potential for problems is high. If one installation cha
nges files and registry entries, these changes are not recorded by the other i
nstallation, which creates a substantial risk for unexpected results.
The information in this article applies to:
Microsoft Visual Studio .NET (2002), Professional Edition
Microsoft Visual Studio .NET (2002), Enterprise Architect Edition
Microsoft Visual Studio .NET (2002), Enterprise Developer Edition
Microsoft Visual Studio .NET (2002), Academic Edition
Microsoft Visual C++ .NET (2002)
Microsoft Visual Basic .NET (2002)
Microsoft Visual C# .NET (2002)
Microsoft Visual J# .NET (2002)

[lbhqu]

Too long. If it is small ,I will help you translate it .

[kahn]

“不可用或未注册的VC包”
上述行为可能在成功安装VS后依然出现。
原因：
上述行为可能是由于Windows Installer发现TLB和DLL在系统中已存在而未安装这些项目。在大多数情况下，这一行为可能是曾装过上一版VS。NET所置，甚至上一版的VS.NET是在其他操作系统中安装的。
解决方法：
执行Visual Studio .NET修复程序来解决这一问题。修复程序通常对于修复此类问题是很有效的，因为它强制注册那些在安装过程中未被重新注册的项目。

通过以下步骤执行修复程序：:
点击：开始->设置->控制面板->添加/删除程序
在已安装的程序列表中选择Visual Studio .NET，然后点击更改
点击Visual Studio安装对话框中的第二项
点击修复/重新安装，然后依照屏幕上的提示去做。

更多提示：
引起这一行为的步骤
为产生这一问题，我们最好在两个分区上安装两个操作系统。两个Windows XP Professional的安装程序都将能运行。
在其中一个操作系统中安装Visual Studio .NET
在另一个操作系统中也安装Visual Studio .NET，在安装时改变默认的安装路径，使用上一个操作系统中的安装路径。
两次都能成功的安装。
在第二次安装Visual Studio .NET的操作系统中启动Visual Studio .NET
这种安装的方式从未被推荐使用。即使安装选择都相同，以用来节省磁盘空间，引发问题的潜在性也是相当高的。如果其中的一个安装程序改变了Visual Studio .NET中的文件或注册实体，这些改变是不会在另一个安装过程中体现出来的，而这就产生了出现预想不到结果的潜在危险。
上述过程对以下有影响：
Microsoft Visual Studio .NET (2002), Professional Edition
Microsoft Visual Studio .NET (2002), Enterprise Architect Edition
Microsoft Visual Studio .NET (2002), Enterprise Developer Edition
Microsoft Visual Studio .NET (2002), Academic Edition
Microsoft Visual C++ .NET (2002)
Microsoft Visual Basic .NET (2002)
Microsoft Visual C# .NET (2002)
Microsoft Visual J# .NET (2002)