Did the Intel® Dual Band Wireless-N 7260 come installed you in your computer when you bought it?
Try this first, clean uninstall all related driver from device manager, make sure no file is left behind, then, proceed with the installation again.
*Important: If your Intel® Dual Band Wireless-N 7260 came installed in your computer when you bought it we recommend that you get all the drivers from your computer manufacturer first.
If not, go to our download center and reinstall the latest driver according to your O.S. Click in this link : Intel® Download Center
We suggest to install the drivers from the OEM (Original Equipment Manufacturer) as they are customized to fit your system as it may contain additional features and has been tested and approved by the manufacturer. According to your information, you already have the latest Intel driver version (17.13.11.X). . What is listed in our download center as version 17.14.0 is our latest Intel® PROSet/Wireless Software, the driver version remains the same.