sometimes my browse freezes for 2-5 minutes. Then its ok for the rest of the day. Any ideas what is causing that?? Thanks?

Ok using win7 on a notebook. I start up the notebook in the morning. The first thing I usually do is bring up the browser (firefox, IE or Chrome) to read my yahoo mail. I might look at the news at yahoo for awhile or go directly to mail. Either way in about 2 minutes the computer freezes for about 3-5 minutes. Sometimes the screen continues to show the mail, sometimes it drops to the desktop screen. When it finally unfreezes itself the computer works the rest of the day ok. So what causes that early morning freezeup??

Lots of possible reasons - without more info we cant help