This problem has surfaced recently. After I switch on my laptop from hibernate/sleep mode, it can't connect to the Internet. It displays all the available networks (wireless) but it never succeeds in connecting to the Internet. It is able to connect to the router though.
I tried many other solutions like disabling windows to turn off the adaptor, but none of these are working.
Additional info:
This problem persists on both wired and wireless. Rebooting will solve the problem until next sleep/hibernate. I am not sure about BIOS, but I had updated windows and drivers recently. Mine is a Dell Latitude E6410 laptop
Best Answer
Something to try- You can right click your network card under device manager, look for a power management tab that talks about turning off the device to save power. "allow the computer to turn off this device to save power" and untick it since you have an issue
also it's worth pointing out that under control panel - network connectinos, you can right click your LAN icon and click diagnose, whenever there is a problem. that can "fix" it quicker than restarting (I tend to set it to DHCP(the default) when doing that).