Wi-Fi doesn't have a valid IP configuration

(I attach an ipconfig/all output text file and a Xirrus screenshot.)

My Windows 7 Lenovo M30 laptop has suddenly stopped connecting to my router. Other Windows 7 devices connect just fine. The problem suddenly arose for no apparent reason. (The device worked fine until yesterday.) I've read widely in forums and tried lots of things without success (below).

Troubleshooting reports these 2 errors:
1) "Wi-Fi doesn't have a valid IP configuration"
2) “Problem with the Wireless Adapter or Access point”

I’ve tried the following so far.
1) Factory reset router (BTHub6)
2) Rebooted PC
3) Disabled Microsoft Virtual WiFi Miniports
4) Disabled Bluetooth
5) Disabled then re-Enabled the (Qualcomm Atheros AR956x) Wireless Network Adapter
6) Updated the driver for the Wireless Network Adapter
7) Checked that “Obtain an IP address automatically” is checked in IPv4 and IPv6
8) Checked that “Obtain the DNS Server address automatically” is checked in IPv4 and IPv6
9) Checked that there was no McAfee Bonjour Service installed.
10) Rebooted again….

Can anyone help?

Many thanks in advance for any ideas!

Welcome to the forum. You get a IP in the range 169 which means Windows can't get an IP from DHCP server. You could set a fixed IP it's either you not entering correct password the router is out of range another router is close killing connection. Disable ipv6 it's not used there 3 routers on channel 6 that can kill it

Many thanks for your reply samuria - I learnt some useful basics here.
When I understood that in order to set a static IP address I would have to do that for all devices on the network, I took the chicken's way out and rebooted the router (yet again) - this time the device connected.
If the problem persists though, I'll grit my teeth and set static IPs for all devices!
Thanks again. :)

You can set any one pc to static you dont have to do them all

Ah - OK. The reason I assumed that is because the instructions I found for setting static IP said not to forget to switch off the dynamic IP service in the hub (so I assumed the hub would be unable to do dynamic for the other connected devvces) . Do I not need to switch off the dynamic capability of the hub? Does the hub recognise whether it is being asked for static or dynamic IP address?
Many thanks for your help !

It stays the same giving out IP the one you set static doesn't ask as it has an IP nothing needs to be done on the router you set it on the PC you may have read how to set it on the router which isn't the same thing