'Limited Connectivity' when downloading/updating your Steam Library over WiFi

[asce]

[Problem]
Whenever you initiate a download/updates from your Steam Library you notice that your WiFi connection will periodically go into a 'Limited Connectivity' state and all web related activities will be interrupted, this is despite the fact that you have a robust ISP package and the latest wireless gear.
You have tried the mandatory resets, refreshes, power cycles, /flushdns and nothing seems to help. I myself have reinstalled Steam a dozen times and even considered reinstalling my OS, but I came across a fix that worked for me and also a couple more that worked for others. I will list some of these fixes and problems in one spot to save some time.

[Possible Causes/Solutions]
- Signal strength and AP position, the obvious problem/solution should always be tackeld first. A little repositioning of your equipment can remedy a world of problems, like moving an AP form one side of a pillar to the other.
- The configuration of your Wireless adapter. Go to Device Manager > Network adapters > WiFi adapter > Properties. There are a couple of settings in here that might make the difference for you. In the Advanced tab there is a 'Multemedia.Gaming Environment' option that can be toggled. In the 'Power Management' tab make sure the radio box for 'Allow the computer to turn off this device to save power' is unchecked.
- The WiFi adapters drivers may be corrupted/outdated/conflicting. So there might be 3 solutions to this one, you either have corrupted drivers which need reinstalling. Outdated drivers that will need to be updated with new ones from the WiFi adapter manufacturers website. The third plausible case is that the new drivers you've just installed are having a software conflict and you need to do a manual driver rollback, which can be done Device Manager > Network adapters > WiFi adapter > Properties > Driver tab. You will need to have the old dirvers available first then proceed to uninstall the current ones.
- Internet over USB devices. In my research i have seen many people state that the majority of WiFi adapters that are Plug and Play can cause a problem with Steam downloads. Possible solutions are, you will need to acquire multiple adapters to test until the problem stops occuring or you will need to acquire a 'Gaming adapter' which is a powered device that uses a patch cable cable between itself and your PC instead of a USB cable. The ASUS (EA-N66) or TRENDnet TEW-687GA are really good options.
- Internet Connection Sharing (ICS) on the WiFi adapter. If you share the WiFi connection to provide web services for networked PCs and devices, disabling the ICS feature for the duration of the downloads might be your fix, there isnt a workaround to this one so far since it seems to be some internal conflict with Steam and this feature, so you might have to disable/re-enable at will.
- Steam's Download limit. You might also want to try setting a download limit for Steam since most of the time it will be at 'No limit'. Steam is fairly aggressive in trying to maximise its throughput by opening multiple simultaneous connections, so sometimes in combination with adapters that work on USB, a piece of hardware is being overloaded. Taking into account that we have ruled out ISPs, PCs, Modem/AP settings and software from the irksome equation, this only leaves Steam and your WiFi adapter to be the likely culprits.