Here is my issue which is very strange and I've tested it various times along the past two weeks,
WiFi router is working very smooth and every device in the household is connected to it with no issues what so ever.
Now here's the messy part, once I start the machine with Ubuntu and connect to the WiFi, every other device including the machine gets disconnected and there's no WiFi signal from the router, until I re-plug the router.
After that, here's the most strange part, the connection becomes so slow only on the machine that you can't even load a google web page.
Sorry, but I'm Ubuntu newbie, and don't know if there are any requirements that I should perform.