Ok, I am back.
That did not do the trick, unfortunately. The problems are still there. What is happening now is that I can not even see the wireless connection available most of the time (when I do the signal in strong), and when the connection is visible and available to the Belkin router, my vista computer does not connect to it. It says unable to connect, and that is it. A few times it has connected for a short while, but only to have "limited connectivity". Such random behaviour really has me lost here...
Also, and this is new now

, this message has appeared next to the wireless connection when it has been visible, once or twice now:
“The capability of your network adapter does not meet the requirements of this network”
This is what the ipconfig looks like when connected with “Limited connectivity”
Wireless LAN adapter Wireless Network Connection:
Connection-specific DNS Suffix . :
Link-local IPv6 Address . . . . . : fe80::b05e:bfff:ef54:2b2%11
Autoconfiguration IPv4 Address. . : 169.254.2.178
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
Ethernet adapter Bluetooth Network Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Ethernet adapter Local Area Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Tunnel adapter Local Area Connection* 6:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Tunnel adapter Local Area Connection* 7:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Tunnel adapter Local Area Connection* 10:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Tunnel adapter Local Area Connection* 11:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Tunnel adapter Local Area Connection* 12:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Tunnel adapter Local Area Connection* 13:
Connection-specific DNS Suffix . :
Default Gateway . . . . . . . . . :
I'm lost here. I think I might have to get a new router, just to be rid of this here cursed one. I can pick up a neighborough's wi-fi (unsecured) and I can connect to that just fine, when I do happen to pick it up.