Is it through a router?
-Double check the date/time are correct
-Change your password @
https://login.passport.com/ChangePW.srf to
Something smaller (under 10-12 characters), then try signing in again.
- Clear your IE cache and cookies -- open Internet Explorer, click the Tools menu, then
Internet Options, then click the Delete Files button, and when that's complete click the
Delete Cookies button.
-Check your IE Security settings -- open Internet Explorer, click the Tools menu, then
Internet Options, then Advanced tab, scroll to the Security section, and verify that "Check
for server certificate revocation" is unchecked. Also verify that 'Use SSL 2.0' and Use SSL
3.0' is checked, then click OK.
-Click Start, then Run, and enter the following:
Regsvr32 softpub.dll
Then click OK
And do the same for the following:
Regsvr32 wintrust.dll
Regsvr32 initpki.dll
Regsvr32 MSXML3.dll
Restart PC.
Did you uninstall/re-install MSN?