Hotmail and Windows Update not working

[Babo]

Hello all,

My laptop was working fine and when I went to school, I linked to my school's wireless network. During my break, I wanted to check my email. So I tried to log into hotmail just as I did the night before at my house. It went to a blank error page. I tried to log into hotmail with another computer and it worked fine. Another thing, I had the window's update icon on the lower right corner of my screen, when I tried to update, it wouldn't let me. So I went to microsoft's website and tried to update windows there, it wouldn't let me. I took it to my school's tech support and they spent two hours on it and they didn't know what was wrong with it. Can anyone help? I am ready to back everything up and reformat it. If you can give me some support as to what I should do before I reformat it, I would be delighted. Thank you.

The tech support at my school has the same computer and he made all the settings same as his computer and it still didn't work.