Hi Catherine, sorry to hear about your woes.
Brian is much wiser than me at this stuff, but until he arrives, I'll throw in my two cents. I think you should do what the geek squad did - plug your computer into another screen. Any screen will do - do you have a television that would work, perhaps?
You can, don't worry. You just have to use the little "DisplayProfile" app that I explained in this article. (You don't even need the whole "TOGGLE.icc" business, just the app.)
Native is the starting point, that's all. If it proves not to be a sufficient match for your prints (as long as you're comparing in good light) then you will explore other options. This is all explained very clearly in my instructions.
Native is ideal if possible, because it means the least screwing around with the LUTs. The further we have to move from native, the greater the risk of banding.
They're five separate lines, on five separate layers, which I then merged into the Smart Object you see in the PSD.
You should have sung out before now!!!! I wanted to share the PSD to make it faster for you, not to bog you down for hours.
Come on, ya tightass
This conversation is completely pointless without prints. You just need a handful of 5x7s. It's no great expense. Hurry up and get 'em done.
No, the monitor won't change with the windows open. It's its own light source, so it won't be affected greatly by another light source.
It's the PRINTS that will change.
I can't answer that, because you haven't posted any for me. Not any actual files.
Please don't think I'm denying there's a colour problem. I believe you. I just suspect it's due (at least in part) to the light in which you're viewing the prints.