|MSN does have a browser...MSN Explorer. |
The link above even shows a graphic of it. The OP should take a look and read about the various versions of MSN Explorer (late versions no longer free).
Regardless, trying an alternate browser may be helpful. It sounds like a "Captcha"-like feature, which may require a more recent browser version to deal with the scripting involved. The feature is intended to help prevent 'robots' from spamming from your account.