Damien Symonds

Yep, that's fine. Finder isn't colour-managed, you see. It's perfectly normal (though annoying, I agree.) All that matters is that Photoshop matches your pro lab prints. Does it?

This is very very very very very very very very very very bad. NEVER use your monitor profile as an image colour space. Only ever use sRGB.

Great! So just do exactly what it says. Choose your Crop Tool, enter 40 and 50mm in the Width and Height fields, and 200 in the Resolution field, and crop, then sharpen. That's all there is to it. Make sure, when viewing it after the crop, you don't zoom further in than 100%. It sounds like you must have been doing so.

Great! And anything about "distance from tip of head to top of image" or anything like that?

Oh, this is a great question. What exact specifications have you been given for the image?

Something is wrong here. Can you check these figures again? Let's start with this. Run this program: https://www.glarysoft.com/

https://www.damiensymonds.net/thread1.html

I did some searching on other sites, and yes, it doesn't look like that ASUS has an IPS screen. Pity, because the IPS screens in ASUS laptops which do have them are amazing. I love mine. It calibrates so beautifully.

When you have the list of resolutions, you should see that one is "recommended":

Try this Channel Mixer layer and see what you think: R +100, 0, 0, +3 G +106, 0, 0, -6 B +115, 0, 0, -10

I've moved this post into AD, since it's not a class question.

How did you go?

https://www.damiensymonds.net/2010/11/colour-modes-vs-colour-spaces.html

I'm not sure, sorry.

Is this relevant? https://www.damiensymonds.net/2015/08/simple-but-important-reminder.html

That's good news. So any time you see a problem, have you closed it, then opened the raw file again ... is it still there?

https://www.damiensymonds.net/2010/06/faq-help-my-raw-files-wont-open.html

Should be just middle slider and black output slider?

Please try not to edit on externals. That's fraught with risk. Externals are only for backup and long-term storage. Were you cropping when these ones had their problems too? Or were you doing something else?

That all sounds good. After this happened, did you immediately close the file, then open it again to see if the same thing happened?

Can you do this for us? https://www.damiensymonds.net/thread1.html

Go for it!

No problem, thanks for asking. Just updated the link.

The you are VERY lucky if a bit of white balance tool mischief is your only problem. You're bloody lucky your computer even starts up.

Do you mean 432GB used out of 465GB? Rather than free?