Your device is at risk because it’s out of date and missing important security and quality updates. Let’s get you back on track so Windows can run more securely. Select this button to get going:

After trying a few things, mainly running the troubleshooter and restarting a few times, I was still stuck in the loop.

Then finally, I tried this and it worked for me:

https://www.microsoft.com/en-us/software-download/windows10

I just clicked "Update Now" and the Update Assistant started and fixed everything.

Hope this helps someone.

ANOTHER SOLUTION WORKED FOR ME, after trying so many tips and tricks over there, including the one here that didn't work:

I eventually FIXED the problem downloading the last Cumulative Update package:  kb4457136

2018-09 Cumulative Update for Windows 10 Version 1709 for x64-based Systems (KB4457136)

https://www.catalog.update.microsoft.com/Search.aspx?q=windows%2010%201709%20x64

Be aware that some in the list are not "Cumulative" and weight about a few MB. Search for the last heavy-weight (~900 MB) "Cumulative Update" and go for a coffee while downloading.

It's worth to mention that before I tried the Troubleshooting for Windows Update, that didn't find anything at first, but some tip in Internet told to delete the content of the folder:

C:\Windows\SoftwareDistribution

so I did, and then the Troubleshooting found some issues, like a WU corrupted database, and it allegedly fixed them, but it didn't (after many tries - why I am not surprised .. ) 

Then I tried the mentioned update named above.

Hope it helps you too.

BR,

• Renzo

hello sir, my name is Ashish. sir i bought a new laptop today with windows 10 pre-installed but while opening the updates option i am getting this problem i.e. "Your device is at risk because it's out of date and missing important security and quality updates. Let's get you back on track so Windows can run more securely. Select this button to get going:". please tell me sir what to do now to fix this.

TL;DR - Download Tweaking.com windows repair tool here.

Pretty self explanatory.

The tool will run automatically after installation. It will look intimidating at first, but bear with it. Skip the initial "pre-repair" and go straight to "jump to repairs" (big button in middle) or "repairs main", second tab upper left.

Then click Preset Windows Update (lower right tab). It will load up and if youre not in safe mode ( i did it without being in safe mode ) it will ask you to click, "I understand the warning". After that click start repairs.

Takes about 5 minutes, at least for me it did, it will go through 9 jobs and then ask you to restart/reboot the computer.

Then try windows update again. It should work. For me, it said windows was up to date. So im not sure why it kept telling me my device was at risk and not showing any updates if I already had all the updates. Probably just a bug.

You can delete KB4058043 if you dont use the windows store ( i dont ). It fixes issues with store stability, downloading when it shouldnt and other issues.

KB4073290 is for older AMD cpu users... how old, i dont know, im running a ryzen 7 so it doesnt apply to my system and did not fix anything. This in response to R. Anthony post.

Major geeks .com is your friend. A lot of useful 3rd party tweaks and tools there. All i did was search "Windows 10 update fix" scrolled down and found one, it said in the description it was no longer supported (probably still works though) and to use the tweaking .com window repair tool.

youre welcome

It also fixed an internet connection issue i was having to. After turning on the computer, the network connect icon would have the yellow triangle with exclamation icon on it and it would take about a minute or so before it would connect. When it should just be connected.

anyways, hope this helps some people out. You can uninstall it afterwards or just create a folder titled "Utilities/Utility" and keep it. Furthermore, dont keep anything important on your computer. If you have to, go buy a usb flash drive, theyre like $30 for 128g usb 3.0 and keep everything important on it and all these useful utilities in case your system messes up again.

I didn't find this KB4058043 , when install this file  KB4073290 its not install, just showing this update is not applicable to your computer,