I connect to the internet by tethering my android phone to my netbook (Toshiba NB505 running Windows 7 Starter). This has worked well for a very long time.
The other day I went to play my morning crossword and received an error stating that xw_control.xml could not be found. I googled and discovered that this file may be flash related. I knew that my flash was downlevel so I downloaded the latest flash.
After that I could no longer connect to my phone. When I open the network and sharing center it is spinning its wheels on "Identifying".
I tried shutting down, did a battery pull on the phone, and did a system restore to a date prior to these events. No help. I also tried to connect to a public wifi network with the same limited access.
Change it to Automatic Startup, and start that puppy.. DHCP client is responsible for obtaining your IP address from your Router (Phone in this case). Without it running you'll never get connected.
Now the important question is how did your DHCP client get set to disabled, it doesn't just happen on its own... I would still run a full scan with your Antivirus and Malwarebytes
That was going to be my very next question - how in the world would something like that get changed. I am ashamed to admit that my antivirus is not current... How do I run malwarebytes?
Malwarebytes found 3 items. I removed them and rebooted.
When in the process of troubleshooting this, I disabled my firewall. I received an error message when I did so, but apparently it did turn it off. Now when I click on "Use recommended settings" I receive "Windows firewall can't change some of your settings. Error code 0x8007042c."
You may want to run the Microsoft Fix It tool located here: http://support.microsoft.com/kb/2530126
Just incase there are other issues with the Firewall that aren't apparent, it may find and resolve them automatically.
I just discovered that I have no sound. "This computer cannot play audio because the Windows Audio Service is not enabled. Would you like to enable Windows Audio Service?". When I click YES I get "No audio devices are installed."