On a regular PC or laptop, you'll see a "print screen" button on your keyboard. (On mine
it's on the upper right hand side). When the message appears, hit that button. Then go to e-mail, a Word document, or Paint and paste ( right click and select 'paste') Voila! A picture of your screen--including the dreaded error message will be available to share with Paul.
The thing is, there's a lot of useful information in that message (for super-sleuthing purposes). A screen shot is the best way to convey that information and move towards the fix.