Internet Access problem latitude e6430 /

Hello , i  have a problem with the wireless - its stops whenever it wants ,all the other laptops and mobile phones are working with no problem with the router . 
It shows yellow signal on the icon so i must disable and enable the wifi everytime to fix it , Sometimes it does not go wrong with hours ,other times every 2 minutes very annoying , depending on what i am doing in internet so i believe it is a software problem . 

I have update to the latest drivers and removed the save power option from dev manager. the problem goes on.


Thank You for Your help.