New System - Vista Home Premium - Not able to browse microsoft sites- able to browse other sites.

I got a new pc with Vista home premium.

With my broadband connection, I am able to borwse internet sites,
except microsoft sites (hotmail, msn).

Also certail applications do not recognize the internrt connection -
Any clue what is the problem?

Many people fix this issue by upgrading their router firmware. this link may
help,

Vista Internet Access IssuesSolved: Vista the internet connection problem
Vista can't access the Internet ... Vista: Can't access some secure web
sites ... don't fix the problem, ...

i'm experiencing the exact same issue. Straight connection from my
modem to desktop. So no router to upgrade. Are there any other fixes?

I got the same problem, an other PC on the same network hasn't got the
problem.
Is there already an solution for this issue?