Thank you for raising your concern in this community.
Hello, after checking your laptop device, it comes with its own keyboard and touchpad, which may be of great help to us in solving your problem.
Your problem is that the USB driver files are not loaded properly in the newly installed Windows system, which is probably because Evoo does not pack the appropriate driver installation package in the motherboard, so that after the computer reinstallation will lose these drivers.
Firstly, try right-clicking on your system's Start menu with the touchpad (you may need to long press on the touchpad) and select Device Manager in the context menu.
After clicking on any of the items, select Action - Scan to detect hardware changes in the top menu, which may automatically fix this driver.
If this step does not work, then it is confirmed that the motherboard does not contain the matching driver, you may still need to go and contact Evoo technical support to get the motherboard chipset driver installation package, if you do not know how to contact Evoo, contacting Walmart customer service shall be your first choice.
If anything is unclear, please do not hesitate to let me know.
Best Regards,
Edward - MSFT | Microsoft Community Support Specialist