Thread: Connection problems with 2 computers

Hi everyone, i have 2 computers and until the day before yestoday, my internet worked perfectly on both of them. However, now i can not connect whem to the internet at the same time. What i want to say is, if computer n.1 is connected to the internet, computer n.2 can not connect. It says that my username or password is invalid, but i checked everything and all is correct(and vis-versa). I called the company. but they told me that it's a router problem. I am using a modem. What can i do to fix it?

Thank you!

Are you using Microsoft internet connection sharing?
see here http://support.microsoft.com/kb/306126