Hi
I don't know of an uninstall function as such built into Windows 10.
If you want to change your operating system, then maybe there is a factory installed recovery area that would wipe everything and install W7 or 8.x.
Try something else like a Linux OS, then drivers maybe an issue or just re-install or overwrite existing Windows 10?
Please give more precise details of what you want to achieve and maybe someone will offer some help.