Here are some aspects to consider and actions you can try for this issue:
- Driver upgrades for Intel® Wireless adapters are normally available from the PC manufacturer's. In most cases, the OEM's will modify and customize the driver to work better with a specific system. It is recommended to use the drivers provided by the PC manufacturer whenever possible. The drivers you can find in Intel Download Center are considered a second option; these are generic versions and may not contain customizations required by some PC's.
The Intel® PROSet/Wireless Software 18.104.22.168 seems to be a Sony release since Intel did not release such version number.
- If the automated updater from Sony is not able to finish the installation, it may be due to a problem with the update tool, or with the Operating System in your computer. If this is the case, we would advise you to contact Sony for assistance on this matter.
- Check in Device Manager under Network Adapters, if the Wireless adapter is detected, and which driver version is installed. Also, check if the Intel® PROSet/Wireless Software is installed in your programs.
- As I mentioned before, if the driver was not installed properly, you can try the manual installation of Intel® PROSet/Wireless Software for Windows 8.1*, version 17.14.0. Select the version that contains the management software and drivers depending on your OS version (32 or 64 bit).
Or, you may use Intel® Driver Update Utility, this tool will detect which driver updates are relevant to your computer, and then will help you install them.