THINGS TO TRY (copied from
http://www.msghelp.net/showthread.php?tid=20295&page=4)
1. Exit MSN Messenger: a. Sign out of MSN Messenger.
b. If you see the MSN Messenger icon in the notification area, right-click the icon, and then click Exit.
2. Clear the Secure Sockets Layer (SSL) state and the AutoComplete history. To do this, follow these steps: a. Open an Internet Explorer window.
b. Click Tools , click Internet Options, and then click the Content tab,
c. Under Certificates, click Clear SSL State.
d. Click OK when you receive the message that the SSL cache was successfully cleared.
3. Verify the Check for server certificate revocation and SSL options in the Security section. To do this, follow these steps: a. Open an Internet Explorer window.
b. Click Tools, click Internet Options, and then click the Advanced tab.
c. In the Security section, clear the Check for server certificate revocation check box and select the Use SSL 2.0 and Use SSL 3.0 check boxes.
4. Check your Firewall and Router Configuration to make sure that port 443 is open to access secure sites. Contact the firewall or router manufacturer for more information.
5. A system component that processes digital signatures may be damaged. To resolve this behavior, follow these steps: a. Click Start, click Run, type cmd, and then click OK.
b. At the command prompt, type regsvr32 softpub.dll, and then press ENTER.
c. Click OK when you receive the message that DllRegisterServer in Softpub.dll succeeded
d. Repeat steps a through d for the following files: Wintrust.dll, Initpki.dll, Dssenh.dll, Rsaenh.dll, Gpkcsp.dll, Sccbase.dll, Slbcsp.dll, Mssip32.dll, and Cryptdlg.dll.
e. Type exit, and then press ENTER to close the Command Prompt window.
6. Verify that the Internet Explorer cipher strength is 128 a. Start Internet Explorer.
b. On the Help menu, click About Internet Explorer: The cipher strength information is displayed in the "About Internet Explorer "box.
If you have Internet Explorer version 5.5 or later, the cipher strength should be 128 bits.
c. Click OK
If the cipher strength is incorrect, some Internet explorer files are missing or damaged. To repair or reinstall Internet Explorer, use the method for your operating system: Microsoft Windows 98, Windows Millennium Edition, and Windows 2000
Download and install Microsoft Internet Explorer 6, or reinstall Microsoft Internet Explorer 6. To do this, visit the following Microsoft Web site:
http://www.microsoft.com/windows/ie/downloads/ie6/default.asp
Windows XP
To repair Internet Explorer on Windows XP, Use the System File Checker tool to scan all of the protected files on your computer: a. Click Start, and then click Run.
b. In the Open box, type sfc /scannow, and then click OK.
7. Clear the entry in the Hosts file: a. Click Start, click Run, type the command for your operating system, and then click OK: o Windows 95, Windows 98, Windows Millennium Edition: %windir%
o Windows NT, Windows 2000, and Windows XP: windir%\system32\drivers\etc
o Windows XP Home Edition: %windir%\system32\drivers\etc
b. In the Windows Explorer window, look for the file that is named Hosts in this folder.
c. Right-click on the Hosts file and click Open with, and then select Notepad.
d. Delete any entries that refer to the passport.com domain - for example, Loginnet.passport.com, LoginMSNIA.passport.com, or login.passport.com.
e. Save and close the Hosts file.
f. Try to sign in to MSN Messenger
8. If your computer is running Windows XP, clear the DNS resolver cache: a. Click Start, click Run, type cmd, and then click OK.
b. In the command prompt window, type the command ipconfig /flushdns. This will flush all DNS entries that have been cached.
c. Try to sign in to MSN Messenger.
TOG