why the wifi card is not working properly in windows 11

Hi, I am an Independent Advisor.
Let me help you with this issue.
I understand you are having problems with your WIFI card not working properly.

Please hover your mouse to the Network or Wireless icon at the lower right-hand corner then right-click it and click Troubleshoot Network. Let the troubleshooter finish until it's done then this should either fix the problem or give us an error message.

If that doesn't work, we need to remove the WIFI driver from the Device Manager and restart the pc to reinstall it.

Here are the steps to completely remove a Device from your computer.

Step 1. Use shortcut keys Windows key+ X
Step 2. Select Device Manager.
Step 3. Expand the entry for Network Adapters, Right-click the problematic device it is either Intel Wireless or Realtek WIFI adapter, and select Uninstall device.
Step 4. You need to check the option Delete the driver software for this device and then click the Uninstall button.
Step 5. Reboot the computer.

After the reboot, please see if the problem is fixed.

If that still does not work, please visit the support website of your laptop or desktop and then download and install the latest Wireless driver then restart the PC.