I have the exact same problem, and have had it ever since the first time I tried to update my drivers.
My driver is currently 126.96.36.1994 (clearly you can see how long it hasn't let me update it), and whenever I download and install it I get a message saying that it's been successful. After restarting and scanning again, it still says that the version is 188.8.131.524- no matter how many times I try (regardless of doing it manually or not), it doesn't let me update it.
I've tried atleast 20 times in the past year and have went through multiple forum posts about it but none have helped me with this problem...
This message was posted on behalf of Intel Corporation
If you are unable to update to the latest chipset driver is because your current operating system already have the latest INF supported for your chipset type.
The latest INF will work if you do a fresh operating system installation, at this point, your computer is covered with the latest version supported.
Thanks for your help Alllan, I have a little additional information that may be worthwhile sharing.
Immediately prior to performing the update the Driver Update Utility allows you the opportunity to review the relevant Readme file. I noticed that point 3 in section 6 (Installing the Software in Silent Mode) reveals that you can check whether the update was successful by reviewing the Version value in the HKEY_LOCAL_MACHINE\Software\Intel\InfInst registry entry. I checked mine using the regedit command and it is set to 10.1.1.14 yet a subsequent scan using the Driver Update Utility and Device Manager indicate that the version to be 10.0.10586.0.