How do I configure proxy settings for LOCAL SYSTEM?

Solution 1:

Figured it out myself:

It is actually the value in Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings that is used.

Since that is not easily modified, you can modify the proxy settings for a user, export the registry key, modify the path in the exported file to HKEY_USERS\S-1-5-18 and reimport it.

Solution 2:

First, run cmd as administrator to open a command prompt.

Command to copy proxy settings of current user to WinHttp:

netsh winhttp import proxy source =ie

To reset the proxy to default settings:

netsh winhttp reset proxy

To show proxy settings of current user:

netsh winhttp show proxy

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Solution 3:

Another way, albeit much messier, is to use psexec to open a command prompt running as LOCAL SYSTEM, then from that open iexplore.exe, modify the settings appropriately.