Online Help with Download Content Fails on Visual Studio 2010
If you first choose online help then go into Help -> Manage Help Settings, then choose Install Content from online you may get an exception message. This may be due to your intranet or desktop requiring a proxy configuration. The application being launched is the HelpLibManager. You can change the config file to enable and fix the issue by adding the highlighted <system.net> settings in the file located at C:\Program Files\Microsoft Help Viewer\v1.0\HelpLibManager.exe.config for 32 bit installations.
Here is a snippet with highlighted added:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<startup>
<supportedRuntime version="4.0" />
</startup>
<appSettings>
<add key="FirstTimeRun" value="False" />
(more settings and file items - left out for clarity)
</appSettings>
<system.net>
<defaultProxy enabled="true">
<proxy usesystemdefault="True"/>
</defaultProxy>
</system.net>
</configuration>
Hope this helps!