I made an account just to say this.
I've had the exact same problem with the exact same wireless card, and was following this thread for a number of days. Nothing suggested thus far has worked aside from madman6886's suggestion to use generic Microsoft drivers instead of Intel ones.
This is the only thing which has worked for me, and instructions on how to do it are as follows:
1. Download an extra copy of drivers from Intel for this card (just in case this doesn't work and you lose any way to connect to the Internet).
2. Go to Device Manager (in Windows 8, type "Device Manager" on the Start screen - it should be under the "Settings" filter - else you can find it in Control Panel), and under "Network Adapters", you should see something like "Intel(R) Centrino(R) Advanced-N 6235".
3. Right-click it and press "Uninstall." Make sure the checkbox for "Uninstall device drivers" is checked, if it shows up. (You'll lose your internet connection here.)
4. Under the "Bluetooth" section, look for the Bluetooth adapter (forgot what it's named, specifically), and repeat the process.
5. Go to Programs and Features (in Windows 8, type "Programs and Features" on the Start screen under the "Settings" filter - else it should also be in the Control Panel), and uninstall anything that has to do with Intel Centrino or Intel Bluetooth or whatever.
6. Restart and open Device Manager again - if you right-click "Intel(R) Centrino(R) Advanced-N 6235" under Network Adapters and go to Properties, under the Drivers section, it should list "Microsoft" as the provider instead of Intel. You are now using generic Microsoft drivers for your card.
I hope this helps anyone out.