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Cannot connect to my home network unless a specific laptop is connected first Answered

This is the strangest problem. My family has 3 laptops: a Samsung laptop (Windows 7), a HP Elitebook (Windows 8) and a Macbook pro.  All of a sudden, the HP and the Mac cannot connect to my home network unless the Samsung is connected first.  Once the Samsung connects (which it does automatically), both other devices will connect as well.  If the Samsung is turned off, I will receive an error message saying that the computer (HP or Mac) cannot connect to the internet--it will try troubleshooting (resetting the wireless adapter) but still will be unable to connect.

If I turn off the Samsung, the other two laptops will stay connected, but if they are turned off, the Samsung has to be turned on and connected to the internet before they can connect. 

I have spoken to the ISP provider and they cannot provide me with a solution. I have deleted and re-installed the home network on all 3 devices, but that hasn't solved the problem. 

The computers are not set up on a HomeGroup.  One ISP technician told me to have all 3 computers on a Public network. (The Samsung automatically is set for Home Network.) The options for the HP windows 8 are Private or Public.  I have switched them all to Public and/or Home-Private, but that hasn't solved the problem.  (I don't understand why I should have my computers on a Public network if I am using my home ISP--I just moved to this town and am using a different internet provider--my previous ISP always said my computers should be on Home Network)

I am not very computer literate but I have looked at the command prompt to see if the IPv Address was the issue. It appears to be correct--the only number that is different is the last one.

Any help you can provide would be greatly appreciated.  If the Samsung laptop breaks or is taken out of the house--the other 2 computers won't ever connect!

Thank you!

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