Those are the steps which work most often for hotspot failure, so make sure you tried all of them.
As to the clue you provided with the DNS error, it wouldn't hurt to run through the fixes here to check it over:
https://kinsta.com/knowledgebase/dns_probe_fini...
https://windowsreport.com/dns_probe_finished_ba... (Avoid ad links which intrude into editorial copy, especially avoid Restoro and Reimage ads)
Let's also go over your networking configuration more thoroughly as it certainly applies:
1) Update your network adapter drivers from the PC maker's Support Downloads web page using the full model number, HP Serial Number or Dell Service Tag on sticker. Compare the latest drivers available for download with the ones presently installed in Device Manager reached by right clicking the Start Menu. Make sure you have the latest BIOS or UEFI firmware, Chipset, Display (Video), Sound, USB3, Bluetooth, Network and all other drivers, or else download and install the latest now.
If you have the latest network driver then try on it's Driver tab also to Roll Back, or Uninstall and then restart PC to reinstall the driver. Try also all older drivers from Update Driver > Browse > Let Me Pick list working backwards.
2) If this was caused by Windows Updates then you can check which were installed at Settings>Update & Security>Windows Update under Installed Updates, then uninstall them from the link there, and hide with the Hide Updates tool downloaded from here:
https://www.howtogeek.com/223864/how-to-uninsta...
You can also use System Restore to get before the problem began, then check for Updates with the Hide Update tool and hide them.
If this was caused by Version update then you can roll it back in Settings>Update & Security>Recovery and then hide it until it matures using the Hide Updates Tool.
3) Go to Device Manager > Network Adapters, select network adapter in use, click on the Power Management tab, clear the check box to "Allow the computer to turn off the device to save energy." Then click on the Advanced tab, disable any energy-saving options.
4) Enable IPv6 in the network adapter settings:
https://www.tenforums.com/tutorials/90033-enabl...
5) Run the fixit from
https://support.microsoft.com/help/929852 (Re-enable IPv6 on all nontunnel interfaces) and reboot.
6) Right click the network icon in System Tray at bottom right end of task bar to Troubleshoot Problems. Choose trying to reach a specific website and put in a URL it won't open to trace the reason. Then run it over and choose your Network adapters to troubleshoot.
7) Try all of these steps:
https://support.microsoft.com/en-us/windows/fix...
https://www.thewindowsclub.com/windows-10-netwo... (Avoid ad links which intrude into editorial copy, especially avoid Restoro ad)
https://windowsreport.com/pc-not-connected-inte... (Avoid ad links which intrude into editorial copy, especially avoid Restoro ad)
8) Go to Settings > Network & Internet > WIfi > Manage Known Networks, highlight and remove the network having problems, restart PC to see if it shows up again.
9) Try plugging in by ethernet cable to the router to compare, then plug the ethernet cable into the modem (if separate) to see if this might be an issue with the router.
10) Try powering off modem, router and PC and then restarting in that order with 1 minute in between each. You may need to reset your router or even optimize it following these steps:
https://www.lifewire.com/resetting-a-home-netwo...
https://www.pcmag.com/article/258865/how-to-set...
Your router manual is always available from the manufacturer's website for your exact model.
11) Another option is you could replace the wireless adapter with an inexpensive USB nano adapter like this one:
https://www.amazon.com/OURLiNK-600Mbps-Wireless...
12) Next let's go over Windows using this checklist to make sure the install is set up correctly, optimized for best performance, and any needed repairs get done:
http://answers.microsoft.com/en-us/windows/wiki...
Start with Step 4 to turn off Startup freeloaders which can conflict and cause issues, then Step 7 to check for infection the most thorough way, then step 10 to check for damaged System Files, and also Step 16 to test a new Local Admin account. Then continue with the other steps to go over your install most thoroughly.
13) If nothing else works then do a Repair Install, by installing Media Creation Tool, open tool and choose to Upgrade Now. This reinstalls Windows while keeping files, programs and most settings in place, is the most stable method to advance to the latest version, and solves most problems. Tutorial here:
https://www.tomshardware.com/how-to/fix-windows...
I hope this helps. Feel free to ask back any questions and let us know how it goes. I will keep working with you until it's resolved.
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Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.
