Having difficulty connecting to a Wi-Fi network after installing Ubuntu on your Windows machine could be due to a few reasons.
Here are a few steps to help you troubleshoot the issue:
Check if the Wi-Fi switch is turned on: If you are using a laptop, make sure that the hardware Wi-Fi switch is turned on. Some laptops have two buttons located at the front or side of the laptop to turn on/off the Wi-Fi.
Check if the Wi-Fi adapter is enabled: Go to the Start Menu > Settings > Network & Internet > Wi-Fi. If the Wi-Fi option is greyed out, it means that the adapter is disabled and you need to enable it.
Check if the driver for the adapter is up-to-date: You can check if your Wi-Fi adapter driver is out of date by going to Device Manager > Network Adapters. Right-click on the Wi-Fi adapter and select “Update Driver”. If an update is available, download and install it.
Check if the system restarted after installing Ubuntu: After installing Ubuntu, make sure that you restart your system before connecting to the Wi-Fi network.
Check if the Wi-Fi settings in Ubuntu are correct: If you are running both Windows and Ubuntu on your machine, it’s likely that the Wi-Fi configuration in Ubuntu needs to be adjusted. To do this, open the Network Manager and make sure the Wi-Fi connections are enabled.
If you have tried all of the above steps and you are still having trouble connecting to the Wi-Fi network, it might be time to consider getting a qualified technician to help you out.
I hope this information helps.