Hello! It sounds like your laptop's drivers may not be properly installed or are incompatible with the new operating system you've installed. Here are a few steps you can try to troubleshoot the issue:
1. Check for driver updates: Go to your laptop manufacturer's website and download the latest drivers for your specific model. Make sure to download drivers for the new operating system you've installed.
2. Reinstall drivers: Try reinstalling the drivers for your touchscreen and Wi-Fi. To do this, go to Device Manager, find these devices, and right-çlíçk on them to select "Uninstall." Then, download and install the latest drivers from your manufacturer's website.
3. Check device settings: Make sure your touchscreen and Wi-Fi are enabled in your device settings. Go to Settings > Devices > Touchpad and make sure the "Touchpad" toggle is set to On. For Wi-Fi, go to Settings > Network & Internet > Wi-Fi and make sure the toggle is set to On.
4. Roll back to previous operating system: If none of these steps work, you may need to roll back to your previous operating system to get your touchscreen and Wi-Fi functionality back.
I hope these steps help you resolve your issue! Let me know if you have any further questions.