oFor two days now, whenever I run my computer, after 3-5 minutes it displays the blue screen and indicates that there is a DPC watchdog violation.  I'm not aware having made any modifications to the computer. It's an XPS 7100 on which I have been running Windows 10 without incident since it first came out.

The onboard  diagnostics show this error code. 2000-0146. I can't run the full online Dell diagnostics because the computer stops before everything completes. However, it looks like there is only one problem, something  to do with a CD ROM drive that doesn't always close promptly when the diagnostics program tests it.

I've tried several fixes that I found by Googling the error. None of them worked. Several of these solutions showed how to update the drivers, but I checked them and everything seems up to date.

What can I do now to fix this machine?,