My Lord:

1) I assure you that I am not arrogant. Nowhere did I state that I expected a reply in 15 mins., or even one day. I was speaking to Harriet, who seemed to have requested the help some time ago (I may be wrong about that).
2) It is my mistake that I posted in the wrong area of the forum. I apologize. The mistake occurred because I am a very new member.
3) Can you help me? No, I'm not using a router or modem. My ISP provides a wireless tower service. No, I am not operating from a school, or any other such place. I'm operating from home, and, I repeat, I have changed NOTHING. LW used to work fine up until a week ago. Thank you in anticipation of receiving your well-needed help.