SSL connection does not work on Windows XP


When you connect to a Web server by using a self-signed Server Certificate over a Secure Sockets Layer (SSL) connection, Microsoft Internet Explorer may generate an error message that states that the server could not be found, and Internet Explorer may then not be able to connect.


This problem can be caused if the Crypt32.dll file incorrectly determines that the server certificate is invalid. Additionally, this problem might also be caused if you have one of the following firewall programs installed on your computer:
  • Freedom Firewall
  • Zone Alarm by Zonelabs
  • McAffee VirusScan and Firewall
  • Norton Personal Firewall by Symantec
  • BlackICE PC Protection


Service pack information

To resolve this problem, obtain the latest service pack for Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389 How to obtain the latest Windows XP service pack

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

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 tool in Control Panel.

Date Time Version Size File name
19-Dec-2001 09:53 5.131.2600.24 544,256 Crypt32.dll


If you install the fix listed in the Resolution section, and you still experience the problem that is described in the Symptoms section, disable any of the firewall products that are listed in the Cause section that are installed on your computer. To do this, follow these steps:
  1. Click Start, click Run, in the Open box, type msconfig, and then press ENTER.
  2. Click the Services tab.
  3. Under Service, scroll through the list to find the service that corresponds to the firewall program that is installed on your computer.
  4. Click to clear the check box next to the name of the firewall service that you found in step 3, and then click
  5. Restart your computer.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows XP Service Pack 1.

Id. de artículo: 314864 - Última revisión: 2 jun. 2009 - Revisión: 1