Can't connect to this network or no internet, secured

Hi.

1) Are your router and computer in the same room or in different rooms or on different floors of your home?

2) Are you connecting directly to the WiFi network of your main router or are you using WiFi repeaters or range extenders?

3) Do the WiFi bands available on your router at 2.4, 5 or 6 GHz use the same name or do they have separate SSIDs? Specify the exact model of your computer or go to Start, type msinfo and attach a screenshot of the System Information page. Also, specify the exact model of your network card or go to Device Manager, expand network adapters and post the screenshot.

Hello Ayan,
Thank you for reaching out to the Microsoft Community and I'll be glad to assist you today.
I understand that you are having trouble connecting your PC to a Wi-Fi network.
1. Are you experiencing this issue with just one particular network or with all networks?
2. Have you tried testing your mobile hotspot to see if you can connect to it?
I recommend trying the troubleshooting steps below to see if they resolve the issue.
1. Re-install Network adapters.
a. Open the Device Manager (Click Windows + X key)
b. Expand the arrow next to Network adapters.
c. Right-click your default Wi-Fi driver (usually Intel (R) Wi-Fi or Realtek Wi-Fi), select Uninstall device, select the Attempt to remove the driver for this device check box, and then select Uninstall.
d. Once uninstalled, restart your PC.
e. Connect your PC to the Wi-Fi network and see if it works.
2. Flush DNS Cache.
a. Open Command Prompt as administrator, execute the commands one by one and click enter for each command.

netsh winsock 
netsh int ip reset 
ipconfig /release
ipconfig /renew
ipconfig /flushdns

Once finished, restart your computer and connect your PC to a Wi-Fi network.
3. Disable IPv6.
a. Open Control panel > network and sharing center > Change adapter settings.
b. Select your Wi-Fi network, click properties.
c. Uncheck Internet Protocol version 6 (TCP/IPv6)
d. Click Ok and apply. You could also click "forgot your wi-fi network" and try connecting it again.
I hope this information helps. If you have any questions, please let me know and I will be happy to help you further. Best regards, Gunasekar N

I'm also currently facing this issue on my Windows 10 Pro PC and I've tried all the methods you've listed here and none of them have managed to fix the problem.

I went on vacation on 24th of December last year and everything worked fine, returned on 7th and every time I wake up my PC it is connected to the router but cant get to the internet. It is a wired connection, other devices are working absolutely fine, if I delete network adapter from device manager, turn off PC and restart router, then turn PC on - i have internet, if I put the PC to sleep and wake it up later - no internet, and only the full routine from before helps.

This is absolute hell!