Desktop Boot and Lockup

Hello, my problem is with a HP 24-e014 All-in-One Desktop PC with product SKU Z5N92AA running Windows 10 Home Edition (64bt).  

Recently it has started booting slowly and/or when this happens, before it will boot into Windows, the HP firmware displays the message I placed in the post title, which is similar to "The CMOS Checksum is invalid (502)" error.  I took a picture of the BIOS system log which shows the 502 errors occurring, but I can't seem to interpret the timestamps, maybe someone could help me with that as well.  

Anyways, I followed the instructions on https://support.hp.com/us-en/document/c04126730 for generic reset of CMOS, since the product page for Z5N92AA does not appear to list specific steps as described.  

This entailed me removing the base, opening the case as gently as possible, and removing the old CR2032 3V battery and replacing it with a brand new energizer brand battery of the same type and voltage.  I held the power button down at various steps to clear the CMOS data as described in the article.  After booting it gave me the 502 error message one more time, and then it seemed to boot normally, but now the next morning, the 502 error message is coming up again.  

It seems like maybe the power is going out at some point in the night which is causing the CMOS data to reset?  Or it has nothing to do with that and it's actually a software issue?  

Does anyone have any experience with this?  It's extremely aggravating.  I would just disable the **bleep** checksum feature myself if I knew how.  The device is out of warranty according to HP Smart Assistant.  

Thank you in advance.  Two images of BIOS will follow.  The first does not show the latest 502 error as I took this picture after replacing the battery.  I have not taken any photos since.  

BIOS System Log