I got a problem with network adapter. It happened after I took out the cmos battery and put it back in.
After I restart the computer, there is a message saying that the network adapter is experiencing driver - or hardware - related problems.
Then I went to device manager and click on the properties of the network adapter, it says "This device cannot start. (code 10)".
Could it be hardware failure? or something in BIOS make it cannot start. I tried to update driver and saw that "Windows has determined the driver software for you device is up to date."
Then I used a wireless adapter through usb but computer could not install the driver for it. So, it looks like I cannot get internet access.