Hi and welcome to the forum
Sorry you are having problems with your Dell laptop.

Windows update is a real problem for people, in general who are running aging hardware (Win7 computers are now 6 years old). Most laptops made today which are not Dell are rarely able to run beyond 5 years without some sort of failure. Such as Windows corruption, virus/malware infection, and most commonly failed hardware.
I'm not familiar with this exact update, but I suspect it has something to do with the recent changes Microsoft has made to their weekly push of updates to look more like the Win10 model. Here's an article which may explain some of that for you:
Microsoft update changes for Windows 7 and 8.1
The real issue for you to determine, is whether or not it's the recent update changes Microsoft has made to Win7 computers by changing from weekly push updates to monthly roll-up style updates or something else as I mentioned above. There are several other things that can cause a computer to "appear" be failing on a specific MS update number, when in reality, it's a symptom of a poorly running computer, infected computer, or a computer with failing or faulty hardware or often a combination of all three.
The best way to start is to do a
FULL BACKUP OF ALL YOUR PERSONAL DATA TO EXTERNAL MEDIA BEFORE PROCEEDING WITH ANY KIND OF TROUBLESHOOTING OR SOFTWARE REPAIRS TO YOUR COMPUTER IF YOU HAVEN'T ALREADY DONE SO!!!
Once you make certain you have a recent backup done, you can proceed to the following list:
1.) Scan your laptop for viruses/malware using whatever AV scanner program you have (Norton, Avast, McAfee, Defender, etc.) and find/remove all viruses found. Next, go to Malwarebytes.org and download and run the free
MALWAREBYTES antispyware scanner. Find/remove all spyware viruses found. Reboot your laptop and retest to see if your Updates are now working.
2.) Test your Hardware and Software using the following article I wrote here:
Windows 10 - Unclickable Task Bar
Make sure you start reading at
POST #6 under the username of
BIGBEARJEDI (that's me). This will solve about 90% of the problems you can have that are causing your laptop not to work with Updates properly.
3.) Once your Hardware is tested and or replaced any faulty hardware found, and you've read through and attempted some of the software repairs in my article, you may decide to do one of the more aggressive repairs such as a Windows resest or reinstallation from Factory Recovery Media. In the majority of cases this will remedy your Updates problem, and other similar problems as well (such as browser failures).
Keep in mind that you'll need to have patience as this troubleshooting make take 2-3 days or a week if you are a Novice at repairing your own computer. If this timeframe is too long for you to bear, you can always take your laptop to your local compuer repair shop such as Best Buy Geek Squad and pay a Professional licensed computer Tech to fix it for you. Expect that to cost $65-$200 depending on if your laptop needs parts or not. By using our troubleshooting procedures, you can save some money on that labor as well as parts if you are into the DIY thing. Remember though, that Laptops are much like automobiles, it takes years, usually decades of skill and expertise to be able to work on them and do it correctly.
Post back with any questions you have along the way. Remember that any computer or laptop can be fixed, it just depends on whether you are willing to spend the time and money to do so. Many people who are tek-savvy attempt to do so, get stuck and flustered and either deem the computer
"unfixable" and throw the computer out in the trash or the bottom of a closet. Try to realize that unless you do this for a living as many of us do, you are not a professional computer repair technician, and it's not going to be easy to learn new skills. Unless of course you reach the end of your rope and pay a pro to fix it for you.
Best of luck,
<<<BIGBEARJEDI>>>