As somebody that's involved in Linux and Software Development, being constantly asked to "look at my computer"

Look, I probably can? But I'm not going to, and certainly not for free. I haven't used Windows in years, and honestly, I mostly go out of my way to avoid knowing anything about what's going on in Windows-land. I'm going to be sitting there websearching for random stuff just like you are. Take to the geek squad, or something. I don't wanna.

As somebody that works on his own stuff, and has worked as a Professional Mechanic in a past life?

No, I don't really want to look at your grocery getter. No, I don't get any special deal on parts pricing. No, I'm not actually going to be cheaper than taking it to a shop, in many cases. No, the mechanics at the shops probably aren't giving you an unlubed and unwilling anal probing. They're expensive for a reason.