Hello Alabaster,
For this situation, it would be good to do a clean install of your Wireless and Graphics driver:
- Download the current Intel® PROSet/Wireless Software for Windows 8.1*
- Download the current Intel® HD Graphics Drivers for Intel® Pentium® Processors and Intel® Celeron® Processors.
- Go to device manager and uninstall the Wireless Network adapter (It should be Intel® Wireless-N 7260). Select the option to Delete the device software from system.
- Go to device manager and uninstall the Intel® HD graphics adapter adapter. Select the option to Delete the device software from system.
- Install the graphics driver you downloaded.
- Install the wireless network driver downloaded before.