# Troubleshooting #### USB Not Booting * Fix: Ensure "Secure Boot" and "Fast Boot" are disabled in your Windows UEFI/BIOS settings. Ensure the boot order prioritizes the USB drive over the Windows Boot Manager. #### Wi-Fi Not Working After Install * Fix: This happens if you skipped the "Third-Party Drivers" checkbox. Connect your laptop to a router via an Ethernet cable or use USB Tethering from your smartphone, then open the "Software & Updates" app, go to the "Additional Drivers" tab, and apply the proprietary Wi-Fi driver. #### Package Installation Errors ("Unable to locate package" or "Unmet Dependencies") * Fix for missing dependencies: Run `sudo apt --fix-broken install` to force Ubuntu to automatically download missing prerequisite files. * Fix for locating local `.deb` files: Always ensure you are in the correct directory and use `./filename.deb` so `apt` knows to look locally. #### Low Disk Space * Fix: Over time, old updates and cached packages pile up. Clean them out with: `sudo apt autoremove && sudo apt autoclean` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://shankar-lab.gitbook.io/mylearning/ubuntu-installation-guide/troubleshooting.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.