Certificate disappears from the Certification authorities store of trust roots

Recently, I tried to connect to the network wireless protected at my University.  The process is to install the root certificate and specifying as trusted root certification authority when you configure the wireless authentication settings.  However, the installed certificate does not appear in the list of CAs root of trust, despite my having (supposedly) the certificate successfully installed Racines (TRCA) trust in the Certification authorities store.  I studied the certificates by running certmgr.msc (in particular, I searched this program name, right click and choose "Run as Administrator").  The certificate was not in the TRCA folder.  I've tried several things:

  • Installation of the certificate through the certmgr program: I click the TRCA file and in the window 'Object Type' I double-click the Certificates folder.  In the toolbar choose Action-> all tasks-> Import...  The Certificate Import Wizard as I navigate on the certificate, click the button "Place all certificates in the following store" and navigate to the Certification authorities folder roots of trust.  I cliquerai on finish, and after a few seconds, I get a window saying that the import was successful.  The list of certificates in the TRCA store hot flashes, but the new certificate does not appear.  I think it is automatically removed from the TRCA Bank when the list of certificates is updated (see below).
  • According to the method described above, I am unable to install the certificate in another folder (for example personnel or trusted publishers) except the TRCA folder.  The certificate continues in these files when I refresh or restart the certmgr program.  I am able to copy the certificate, then paste in the TRCA folder, and in this case it actually appears.  However, she disappears from the TRCA folder as soon as I click Refresh or restart the Manager.
No idea why the certificate is in the process of disappearance?  The TRCA is protected somehow?  Thanks for your help!
Also, I am running Vista Home Premium Edition with SP1, on a Lenovo laptop.

I solved the problem by installing this update:

http://www.Microsoft.com/downloads/en/details.aspx?FamilyId=7A0FF471-Ace1-4B82-8CD8-1529B9B03AEF&displaylang=en

Tags: Windows

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