not sure if this is a windows 7 or 2820vn problem.
but ever since swapping to windows 7 from xp, nothing works well any more. i cant log in to bad company 2 and when i log in to sc2 i get micro disconnections (achievements enabled/disabled spam)
if i disable the windows 7 firewall i cant even connect to steam!
if i put my computer in dmz mode i cant connect either.
in xp everything just worked no problems.