:-) After you've vented (not on the kit though), you could tackle this by viewing them as 3 variables;
1) Wireless settings
2) Router wireless fault
3) Laptop wireless card fault
1) Belkin Wireless set-up.
There are quite a few threads in this forum that relates to this, in addition to a manual for your specific router which you can find on the Belkin support web site.
Although other threads may deal with non-Belkin routers, the steps involved tend to be the same. E.g. click here
It would probably be easier for you to borrow a laptop or USB wireless adapter, which is known to work, to check if your router's wireless is working.
If you don't know anyone with such items for loan, you could buy a USB adapter at less cost to test things out.
If things work, then it could replace your laptop's wireless card which by process of elimination, is probably the faulty item.
Even if the router turns out to be faulty but not the laptop wireless card, the USB wireless adapter could still be useful should you move the existing desktop elsewhere, due to a new replacement desktop.
Alternatively, if you know someone who has a laptop which has wireless working, that could be used to connect to your router to prove whether it works wirelessly or not.
As you can get a router bundled with a wireless adapter, there's probably little value in getting them separately though.
Hope my thoughts have been of some help.