Make sure to try the driver with the Power Management option enabled. The 17.12.0.4 driver is working without problems on my Dell XPS 15 L521x laptop running Windows 7 Pro 64 with 7260 power management enabled.I have wake-up problems when I disable these options.
I have both the 7260 Power Management option enabled ("Allow the computer to turn off this device to save power" under the Power Management tab) and the U-APSD option enabled under the advanced tab. There is also a device named "Microsoft Virtual Wifi Miniport Adapter" that I have the power management option enabled to allow the computer to turn of the device.