I avoid using the manufacturer's "login" websites to administer local routers. Just adds layers for more potential errors of omission or commission.
At least routerlogin.net works so my thought is that the being unable to directly login to the router is a local network issue.
There should have been more information provided by "ipconfig /all". Did you leave out part(s) of the results?
In any case, ensure that on your personal Win 10 system that only
one network adapter either wireless or wired is enabled. Not both adapters and not two adapters at the same time.
"ipconfig /all" indicates you are using wireless via a wireless LAN with the Physical Address = 34-C9-3D-B0-0C-0C (Matches Intel)
Reference:
https://macvendors.com/
Another note:
"Description . . . . . . . . . . . : Intel(R) Wi-Fi 6 AX200 160MHz"
Is 160 MHz correct or expected?
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Try disabling IPv6. IPv6 can and does create problems for some devices and host networks.
Take a closer look at the router's network configuration settings using other computers if and as necessary.
Check for some limit on the number of allowed connected devices.
Ensure that the DHCP IP address range is wide enough to accommodate 30 devices. Ensure that there are no conflicting Static IP addresses being used.
Look for any blocked, restricted,or reservations regarding the MAC/Physical address in the router.
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Going back a bit just to ensure that I understand correctly:
When you type 192.168.1.1 (Default Gateway IP) into the personal Win 10 system you are unable to access the router's admin pages - correct?
However, you can and are able to directly access the router's admin pages by typing 192.168.1.1 into the browser of other computers - likewise correct?
As a matter of elimination, take a look in the hosts file of your Win 10 system. FYI:
https://www.howtogeek.com/27350/beginner-geek-how-to-edit-your-hosts-file/
Unlikely that the problem is in the hosts file but no harm in checking just to be sure.....