Have you tried ...
Connecting the card to another computer to see if it reads it there?
A different card reader?
Another card in this reader to see if it reads ok?
Ok, that's a bit better. Still not great, but out of the danger zone at least.
I encourage you to run Glary on both computers when you get a chance, and maybe Scanner too. When you have time.
Ok. That firms my conviction that this is something to do with the PremierColor. If you can find how the settings differ, and make Cara's match yours, you'll (hopefully) find that Cara's computer calibrates properly.
If this is the case, it might be also true that you get to hang on to your Spyder 3 for a bit longer
Great! Chrome is completely shithouse, and we need a shithouse browser for this test. I want to know, when you both open the exact same web page, whether they look wildly different in colour.
(Or whether this problem is restricted only to Adobe programs.)
Gosh, how bizarre.
So somehow you've turned something off, or Cara has turned something on ... or vice versa.
If there is a Dell PremierColor control panel on both computers, you need to examine the settings and see how they differ, I reckon.
How weird. In between "Night light settings" and "Scale and layout" there should be a "Colour profile" section.
Does Cara's have the "Colour profile" section?
Just to confirm - when you copied your profile over to Cara's computer, you replaced her Spyder profile with yours, yes? There aren't two Spyder profiles on her computer now, are there?