Hi, John.
Thank you so much for your reply.
Unfortunately, this happened again today, and - despite following your directions via scanning my files and restarting my laptop - my background is still black. However, this problem seems easily fixed by simply going into the "personalization" section of the settings and changing the background image.
Since this is the second time that this black screen happens, could this be indicative of a virus or some kind of malware on my laptop? When I scanned my files using the process you mentioned, there were no reported abnormalities or malware found on my laptop, so I find it weird that this happened again.
Please let me know if you are able to help me with this.
Best,
AB