Nice find, Corrine. I've since offered my main PC as a sacrifice to WU but I did pause when I saw the description of that KB#, I don't own a printer so that Service is always disabled (historically it was often a nuisance anyway, that log jamming Print Spooler Service) on my own machines.
I'll wait a few days before allowing the other PCs around here to update, with the exception of the one that does sometimes use a printer. I'll also need to check that none have picked up the CPU/memory hogging bug again.