About the only bright spot in the day was a post-work massage, which erased a couple years worth of tension from my back and shoulders and will probably help the lymph nodes in my legs work a little better to boot. I also managed to conform to the Law of the Fish, which in my case is kind of optional, but I figure I need all the help I can get at this point.
The HD/OS order from Amazon got derailed because I didn't have enough flex in the store card to make it go, which would enable me to postpone paying for them for six months.* This has been corrected, and I'll resubmit the order when the payment posts.
Tomorrow, it's back to the tax mines. There may be blood.
*By which time something else (like the motherboard) will probably have failed. :(