When your Windows PC acts up, what do you wish you could just ask it?

Question for people who run Windows at home or at work.

When your PC acts up, what's the first thing you wish you could just ask it? "Why is C: full?" "Why did it restart overnight?" "Did my backup actually copy everything?" "Which file had the word 'renewal' in it?"

I keep seeing the same few questions in forums, and the answers are almost always "run these eight commands and paste the output". I'm building Local Commander so your AI runs them on the PC itself and tells you what it found. I use it on my own machines. Before I write anything up as a how-to I want to know which questions people actually have.

What would be yours?