I have a Lenovo z510. I just noticed that my connection got "limited" with a yellow sign. I disconnected and connected my laptop again to the router from the settings and the problem got fixed. Is this normal? The problem happened again and I re-booted the laptop and it got fixed. I am using a new router and the problem hadn't happened before. I also have the latest driver for my wireless card. I hope that you can help me. Thank you.