Recently after picking up my Dell Inspiron 15 5593 (with Windows SSD boot drive and add-on 1TB HDD) to carry it to a more comfortable location to use, I was carrying it open and level by the front left corner (where the features sticker is) with my left hand while it was up and running.  To my shock and horror, the computer blue screened for the first time ever and displayed - Stop Code: DRIVER_IRQL_NOT_LESS_OR_EQUAL.

Tried all the various native recovery options to reboot the computer - nothing worked.  It seemed like the boot drive was gone!  Although, when I did a directory of C: drive from the command prompt my HDD root listing appeared.  I started doing a Windows reinstall from USB but cancelled before it got started - seeing my data drive as C: drive seemed to be pointing to a potential cause of the problem.

Looking online for more clues, I discovered that the M.2 SSD (SD card size with a lot more contacts) is right under the features label!  After powering down the computer I removed the bottom.  Removed the screws holding the SSD carrier and removed the SSD, reseated it and powered the computer back up.

To my amazement the computer booted like always!  Buttoned things back up we're all good!

Not looking for help with this one, just wanted to put my findings out there for any other owners to reference in case they find themselves in a similar situation - and to warn you to be careful of applying pressure to the case around the SSD / features label.