For most of the problems with the network cards dropping the WIFI signal the solution is to remove the Lenovo EMC Storage Program, which in turns removes the file called discovery.exe file. When running this file clogs your WIFI network with massive internal traffic, and no other device, including your Lenovo can connect to the Internet. With some more advanced routers you can still get some limited Internet connection. You can try if this solution will fix your problem by going into the Task Manager, Services tab, and manually stop "Lenovo EMC Storage Program" service. Then go to the Details tab and force stop "discovery.exe" file, if still running. If that fixes the your problem, then un-install the program called "Lenovo EMC Storage Program", and you are done. Just watch after that that your Lenovo Solution Center does NOT install it again. Hope this will fix your problems.