257824 OL2000: Differences Between Outlook and Outlook Express
IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
When you upgrade Outlook Express, you may experience the following symptoms.
If you upgrade Outlook Express 4.x to Outlook Express 5 or later, and then attempt to start Outlook Express from either the desktop icon or from Microsoft Internet Explorer, you may receive one of the following error messages or Outlook Express may not start:
When you upgrade Outlook Express 5.0 to Outlook Express 5.01 or later, and then attempt to start Outlook Express from either the desktop icon or from Internet Explorer, Outlook Express does not start, and you do not receive an error message.
This issue can occur if there is missing or corrupted information in the Outlook Express Identities registry key.
WARNING: If you use Registry Editor incorrectly, you may
cause serious problems that may require you to reinstall your operating
system. Microsoft cannot guarantee that you can solve problems that result
from using Registry Editor incorrectly. Use Registry Editor at your own risk.
To work around this issue, use the following methods in the order in which
they are presented.
Before you back up the Identities subkeys, you must rename the Username value of the Main Identity subkey. To do so:
HKEY_CURRENT_USER/Identities
To do so, in the left pane, click the plus sign (+) that is next to each registry key or subkey in the path to expand each branch until you locate the subkey that you want to delete. For example, in the following registry subkey path, the subkey is Identities:
HKEY_CURRENT_USER\Identities
{AFE1AA0D-D202-4C52-AC8D-F68DE06421C1}
For each identity that you create in Outlook Express, an entry is
automatically created in the Microsoft Windows registry. Back up these
identities before you delete the Identities subkey. If you do
not, you may be unable to use your current identities or shared contacts after
you restart Outlook Express.
To back up your identity information:
For additional information about how to back up Outlook Express data, click the article number below to view the article in the Microsoft Knowledge Base:
270670 OLEXP: How to Back Up and Recover Outlook Express Data
After you have successfully backed up all of the individual identity subkeys, proceed to the next method.
To delete the Identities subkey:
To re-create your Identities subkeys:
For additional information about using identities in Outlook Express, click the article number below to view the article in the Microsoft Knowledge Base:
209169 OLEXP: How to Create and Use Identities in Outlook Express 5
After you finish using the preceding methods to restore your identities, you need to manually re-create your e-mail and news accounts. For additional information about how to create e-mail and news accounts in Outlook Express, click the article numbers below to view the articles in the Microsoft Knowledge Base:
171163 OLEXP: How to Configure Outlook Express for Internet Mail
171164 OLEXP: How to Configure Outlook Express for Internet News
NOTE: For questions about specific e-mail or news account settings, please contact your e-mail provider, your Internet service provider (ISP), or your newsgroup administrator.
| Last Reviewed: | 10/3/2002 |
| Keywords: | kbenv kberrmsg kbprb KB245419 |