What router have you? These is a way of analysing errors with the right router.
My router is the BT Home hub 2 

As well as hijacking the thread with a similar problem to the OP, you aren't looking at who replies are addressed to. XRaySpeX didn't ask you.
That's the sort of reason hijacking is not a good idea.
However, re your own problem, ignore the huge upstream figure, that is a reporting error in the HH2.
The local errors suggest to me you have something connected to the phone line not going through a filter. Usually a Sky box or a burglar alarm. Or a filter has failed.
My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost.
Internet connection - IDNet Home Starter Fibre.
Live BQM.
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