At Wolfetone, Re: your MILTB...
I was in a similar situation with my Father In Law To Be & his brand new E-Machine. He would call me up asking how to do $X, I'd tell him I'd be over in a few to show him, then spend a few minutes creating a How To sheet on explaining exactly how to do $X.
Step by step instructions, cropped screenshots with text lables pointing to things needing attention, & essentially "holding his hand" without actually holding his hand.
When I arrived at his place I'd lay the How To sheet down beside his computer, patiently go through it with him, & make sure he could apply the fix all by himself. I would rarely get a repeat call for the same issue, unless he had lost the sheet. He kept them in a binder labled "How To's" & would go back to it if he had the same problem, since I had already given him the answer. It wasn't that he wasn't smart enough to remember such things, he was a math prof & could run rings around most other folks in his field, but he knew SFA about *computers* which made my How To's invaluable to him.
Give it a try, make a physical print out of the details on how to fix the problem, & walk with her through it. She'll eventually stop having to call you with repeat requests, saving you for those times when the feces REALLY hits the oscillating oxygen moving device.
It'll make things a hell of a lot better between you, MILTB, & the SWMBO. Cheers, and enjoy a pint on me! =-)