Cshong, please accept our apologies for the issue you are experiencing and the misleading information you received.
At this time, the issue is handled in thread below for the wireless adapter model you own.
The latest driver version for all Intel® 7260 wireless adapter series is 16.6.0.
Please install this driver and you may report in the link provided above. We are still working to solve the issues you have reported that are not solved with this driver version.
I don't mind to continue using Microsoft driver, but more prefer the official driver from Intel if it can fix the issue.
I believe that the driver included in Windows is actually the older version provided by Intel to Microsoft, am I right? If Intel does not fix this bug, later when Microsoft release new Windows version (e.g. Windows 9), the driver version included in the newer Windows may not be the same as Windows 8. It may be the newer version Microsoft got from Intel. Nobody can guarantee that it will not include the same bug.
So, I still hope Intel can fix the bug, at least in the newer version.