Step 1: Download the most recent Cirrus Logic drivers from the Cirrus Logic page. The CS4207 driver is actually more appropriately named "CS42**" driver.
--> go to this page: Here
--> click the "Resources" tab
--> in the "Resources" tab, under the "Tools & Software" heading, select the appropriate driver ZIP file for your particular configuration. Since I am operating in Windows 7 64 bit, I chose the "CS4207 Windows Vista (32/64-bit) and Windows 7 (32/64-bit) Driver, 8/2010, v6.6001.1.26 : 100 KB"
--> download the file to your desktop
--> create a folder on your desktop called CS4207 Drivers (the name doesn't actually matter)
--> move the downloaded ZIP file to this new folder
--> expand the ZIP file within this new folder
Step 2. Go to Control Panel, Device Manager.
Step 3. In Device Manager, open up the "Sound, vide and game controllers" sub menu.
Step 4. If you're like me, you had 4 NVIDIA High Definition Audio entries, and one Cirrus or Intel entry. Click on the Cirrus or Intel entry for the Sound controller. Uninstall the driver and, if it gives you the option to delete the driver files used, do so.
Step 5: Go back to Device Manager, and select "Scan for hardware changes" from the right click dropdown menu.
Step 6. Let your system automatically install whatever driver it wants.
Step 7. Select that new driver entry in Device Manager; right click the entry to update the driver; choose the Browse option, then the Let Me Pick option; and then select the new folder on your desktop as the driver location.
Try to install the Windows 8.1 driver from this website: Link (or here you have the Download Link directly: download).
One solution would be:
- Boot into OS X
- Select Windows as primary boot partition
- Restart your Mac (it should boot now directly into Windows)
- Restart Windows (NOT turning off. Start > Restart)
Second suggestion:
- Uninstall the driver completely
- Restart into OS X
- Then restart into Windows
Sometimes the WiFi driver is working after a few minutes. If not: Install the driver from above (from the Download link).
It has something to do with Bootcamp and Mac. This isn't a Windows problem. The driver isn't loading properly. Maybe Apple is going to fix this.
Best Answer
I have the same problem too. I've solved this with updating the driver but with an old driver Broadcom version 5.106.199.1 (11/13/2012). Here is the steps :