|Have you another machine in the house just to prove it is not something to do with the receiver in your computer?|
I've not found Belkin reset as fussy as they suggest and mine does a quick reset in much less than 7 seconds. Just pulling the power plug for a few seconds also seems to do much the same thing.
EIther way you have to wait a minute or so before it works properly again.
For my Belkin you have to hold the button in for 20 seconds to do a "full factory reset", which might prove necessary. You will then need to set it up with the CD. Your encryption would also have to be setup again.
Hardware failures are relatively uncommon but you might just be unlucky.
How to know you are getting old 5:
A lamp post backs into you