Qusetion about a cookie bs.serving-sys.com or serving-sys.com

are these dangerouse cookies? i keep getting them i never use to get these cookies it started about a month ago norton 360 get rid of them but as soon as i go on msn.com it comes right back i blocked these cookies and there not comeing back but there still showing up on msn.com every time i go on the and they never use to i just want to know if they are dangerouse

hi

I remember these being in my NIS2008 logs and  If I remember rightly they are part of microsoft.Have you tried Googling them?