FIX: Error message when an application tries to use Internet Explorer 7 to retrieve a proxy configuration script: "1003 ERROR_CAN_NOT_COMPLETE"

When an application tries to use the InternetGetProxyInfo Windows Internet (WinINet) API function of Windows Internet Explorer 7 to retrieve a proxy configuration script, the application may fail. Additionally, you may receive the following error message:This problem may occur when the application tries to retrieve the proxy configuration script for the first time. However, the application may succeed in retrieving the proxy configuration script on later requests.

This problem occurs because of a logic problem that causes the InternetGetProxyInfo function to fail the first time that it is called.

Security update information

To resolve this problem, install the most current cumulative security update for Internet Explorer. To install the most current updates, visit the following Microsoft Web site: For more technical information about the most current cumulative security update for Internet Explorer, visit the following Microsoft Web site: Note This fix was first included in security update 933566 (MS07-033). For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Service pack information

To resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Hotfix information

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

Prerequisites

To apply this hotfix, you must have Microsoft Windows Server 2003 Service Pack 1 (SP1) installed. For more information about how to obtain the latest service pack for Windows Server 2003 , click the following article number to view the article in the Microsoft Knowledge Base:

Restart information

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

Registry information

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

To enable this hotfix, you must modify the registry. To do this, follow these steps:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_IEAUTOPROXY_SYNC_KB931195
   Note If this subkey does not exist, create the subkey. To do this, follow these steps:
   1. Locate and then click the following registry subkey:
      HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl
   2. On the Edit menu, point to New, and then click Key.
   3. Type FEATURE_IEAUTOPROXY_SYNC_KB931195, and then press ENTER.
3. Click FEATURE_IEAUTOPROXY_SYNC_KB931195.
4. On the Edit menu, point to New, and then click DWORD Value.
5. Type the name of the application including the .exe extension, and then press ENTER. For example, type iexplore.exe as the name of the application for Internet Explorer to use this hotfix.
6. Right-click iexplore.exe, and then click Modify.
7. In the Value data box, type 1, and then click OK.
8. Exit Registry Editor.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Internet Explorer 7 for Microsoft Windows XP Service Pack 2

Internet Explorer 7 for Microsoft Windows Server 2003

The original release version of Windows Vista

Microsoft has confirmed that this is a problem in Internet Explorer 7. This problem was first corrected in Windows Vista Service Pack 1.

For more information about the InternetGetProxyInfo WinINet API function, visit the following Microsoft Developer Network (MSDN) Web site: