Sometimes Windows refuses to connect to a wireless network (eg Eduroam) and no matter what you do it just will not reconnect even though you have had to connected in the past to that wireless network. Grrr….
If you are within range of the specific wireless network, you can left-click on the wireless signal icon 
and then right-click on the Wireless network you want to remove and select “Forget”.
I have found that sometimes this doesn’t remove every trace of the wireless network, but I have found a useful command line method on Windows 10 which reliably removes a corrupted network configuration.
Press 
+ X to call up an extremely useful menu with some very handy shortcuts to Windows tools. Select “Run…” and then type in the box:
cmd
A scary black box will appear … this is good! You can type commands into the black box and get stuff done. 🙂
But for now, you should only need the two commands below …
Show all wireless profiles on the PC
netsh wlan show profiles
Delete a profile
netsh wlan delete profile name=”ProfileName”
(Where ProfileName is the name of the network you want to remove – NB you need to put the ProfileName in quotes)