Latest updates on SLED 15 SP1

Hello again. Turning on my laptop after a week’s absence, I found it impossible to install the latest updates, including that of Firefox. Moreover, after rebooting, my system refused to continue beyond the login screen, so I had to use an earlier snapshot. Is this a personal mess, or it has occured to anyone else as well? Thanks for your time.

What type of graphics card in your system?

/sbin/lspci -nnk | egrep -A3 "VGA|Display|3D"

Hi Malcolm. First, I would like to thank you, since you have helped me a lot with all my questions so far (no matter how silly they might be). Well, the full specs of my laptop are: Dell Vostro 3584, Intel Core i3-7020U @2.3GHz x4, Intel HD Graphics 620 (integrated), 8GB DDR4-SDRAM, NVMe Liteon 256 GB SSD. Thanks.