[past 2 days cant log-in,says cant access in with this computer ?? help me plz????]

Same for me. I did what is suggested by valerie in her answer: send a mail to the support ( not so easy to find) and what they do is only route me to the forum, here!!!!!!!!...I'm turning round in circles....

 

[Why is it that I currently cannot log into Second Life?]

I can't either, they say "Second life is not accessible from your computer"