Hi jonfweber
There are a number of reasons this might happen, so try the information here
and see if it will help:
Verify that Internet Explorer Is Using 128-Bit Encryption
To check:
1. In Internet Explorer, on the Help menu, click About Internet Explorer
2. The level of encryption on your computer appears next to the words Cipher
Strength. Verify that the Cipher Strength value appears as 128-bit
If the Cipher Strength is anything less then 128-bit, download the Internet
Explorer High Encryption Pack to your computer's hard disk, and then install
it.
Delete Temporary Internet Files
There's also a possibility of some corrupted files in your Temporary
Internet Files (TIF) storage. To clear these:
1. In Internet Explorer, on the Tools menu, click Internet Options, and
select the General tab
2. Under Temporary Internet files, click Delete Files, and click OK when you
are prompted to confirm the deletion
Configure Internet Explorer Security, Content, and Advanced Settings
Configure Security settings for the Trusted sites zone in Internet Explorer:
1. In Internet Explorer, on the Tools menu, click Internet Options, and
select the Security tab
2. Select Trusted sites, and then click Default Level
3. Add the secure Web site you are trying to access to the Trusted sites
zone. To do so, click Sites, type the address (URL) of the site in the Add
this Web site to the zone box, click Add, click OK, and then click Apply
Clear the Secure Sockets Layer (SSL) slate and AutoComplete history:
1. In Internet Explorer, on the Tools menu, click Internet Options, and
select the Content tab
2. Under Certificates, click Clear SSL State
3. Click OK when you receive the message that the SSL cache was successfully
cleared
4. Under Personal information, click AutoComplete
5. Under Clear AutoComplete history, click Clear Forms. Click OK when you
are prompted to confirm the operation.
Verify that Internet Explorer is configured to use SSL 2.0 and SSL 3.0:
1. In Internet Explorer, on the Tools menu, click Internet Options, and
select the Advanced tab
2. In the Settings box, under the Security header, click to select the Use
SSL 2.0 and Use SSL 3.0 check boxes (if they are not already selected), and
then click OK
Verify that the Date and Time Settings on Your Computer Are Correct
Because SSL certificates have an expiry date, if the date on your computer
isn't correct, it may prevent you from connecting to secure sites. To verify
that your computer is configured with the correct date and time settings:
1. Click Start > click Control Panel
2. Click Date, Time, Language, and Regional Options, and then click Date and
Time
3. Select the Date & Time tab
4. Check to make sure that the date and time settings are configured to use
the current date and time, and then click OK
Some Microsoft Knowledge Base Articles dealing with this problem
232012 - Error Message When You Attempt to Install 128-Bit Upgrade
261328 - Cipher Strength Appears as 0-Bit in Internet Explorer
301803 - Error Message When You Try to Connect to Secure Site: Client
Certificate Has Expired or Is Not Yet Valid
303807 - "The Page Cannot Be Displayed" Error Message When You Try to View
Web Page on a Secure Web Site
305217 - Page Cannot Be Displayed Error During SSL 3.0 Server Session
Timeout
811383 - Internet Explorer Connectivity and Certificate Display Issues
813951 - You Cannot Access Your MSN E-mail Account or Authenticate with a
Web Site in Various Programs
821814 - You Receive a "Page Cannot Be Displayed" Error Message When You
Post to a Site That Requires Authentication
If these steps do not resolve your problem, please post back to this thread
with the details and any error messages.
Hope this helps
Jan

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but it seems to refer to a different set of symptoms. It isn;t that
"nothing occurs" or that I get an error. Let me explain better what is
happening: when I enter "
www.microsoft.com" in the address window, IE 6.0
goes to the site and hangs. (shows hourglass - page fully loaded except
lower left hand side which is blank white). I can run the same page with
Mozilla and it works flawlessly.
Jan