(If the above doesn't work, try fastboot oem asus-go followed by fastboot oem asus-go confirm before booting the image).
Go to Settings > About Tablet and find your model number (e.g., P00C) to ensure you download the right files, as flashing the wrong ROM can permanently damage your tablet.
If commands return a "waiting for device" error, check Windows Device Manager. You may need to manually force the driver selection to "Android Bootloader Interface" or swap USB ports (preferring USB 2.0 ports over USB 3.0). Asus Zenpad 10 Z300c Custom Rom
Thankfully, the Z300C can be rooted, and there are proven methods available. The most reliable method involves using Fastboot commands to flash a specially modified boot image. According to user reports on XDA, the process typically involves:
: Ensure the tablet has at least 70% battery to prevent power loss mid-process. (If the above doesn't work, try fastboot oem
Back up all essential photos, documents, and accounts. The unlocking and flashing process completely wipes internal storage.
Repeat the installation process for GApps. You may need to manually force the driver
It will not give you a newer version of Android, but it will make the existing one far more usable.
The is a challenging device for custom ROMs because it uses an Intel Atom (SoFIA) processor, which has very limited third-party developer support compared to Qualcomm or MediaTek chips.
(SoFIA)—created a unique set of technical hurdles that hindered the development of a vibrant third-party ecosystem. The Technical Deadlock
Download the custom ROM and GApps (Google Apps) from the official website or a reputable source.