Install this driver direct from Intel, see what happens: https://downloadcenter.intel.com/download/27239/Intel-PROSet-Wireless-Software-and-Drivers-for-Intel-Centrino-Advanced-N-6205?product=59471

Surfpunk beat me to it, but yeah DL the latest OS specific driver

Interestingly enough I also found a techdoc from a while back that listed this which was similar to your issues

For unknown reasons, when the power plan is set to "power source optomized", the power consumption for PCI devices is set to 'maximum power savings'. To correct this, proceed as follows:



1) Open "Lenovo Power Controls", which can be found in the Control Panel folder. This will launch the 'Power Manager' application.



2) Press the 'Advanced' button in the upper right corner. It will say "Switch to: Advanced". If it says "Switch to: Basic", then you are already in advanced mode, you don't have to do anything for this step of the process.



3) Press the maximize button in the upper right of the Power Manager window (this is optional, but it is a heck of a lot easier to work with the Power Manager when it is expanded to full screen size and you can see much more of everything at one glance.



4) Click the downward pointing caret symbol beside 'Advanced Settings' to expand the selection of various advanced settings.



5) Go to 'PCI Express' (second item from the top in the Advanced Settings Group) and select OFF for power management when you are running on external power. You can select whatever you want when you are running on battery power. Battery power is the left vertical column, external power is the right vertical column. Press the APPLY button in the lower right of the screen to make your selection stick. Then press OK to dismiss Power Manager.



That should solve your problem.

That might be a bit overkill, since other devices use the PCIe bus besides the WiFi card (GPU and audio, for example). Should be able to accomplish the same in Device Manager, by going to the Power Management tab in the wireless adapter properties, and unchecking the "Allow the computer to turn off this device to save power" box.

This has been installed - I'll test the wifi when my gf leaves.



I did try that before; but I'll try it again.

Update; both of these did not resolve the issue.

What windows 10 version do you have?
Can you try doing this...

right click start > system > system info (top right,might have to max window to see it) > advanced system settings ( left side ) > hardware tab > device installation settings
Select no > save changes > reset pc and reinstall drivers link by surfpunk.

W7, not 10

At this point, if other WiFi networks work, then it's not a defective adapter. I'd lean towards a chipset incompatibility between the Hitron gateway and that Intel adapter. It's been known to happen. Maybe pick up an inexpensive WiFi router and set it up behind that box. You can get a TP-Link Archer C7 for under $100 CDN.

I'm wondering if I just do a factory reset on this thing might solve it? I only use it for browsing and MS applications and nothing on there is of significance

Worth a shot, if there's nothing on the unit. Certainly cheaper than a new router.