Is there a stable version of Linux that I can install but not have to constantly tweek to keep working?

One of the main advantage's of Linux and linux distributions is that the Linux Kernel and other software is regularly updated to ensure the OS is compatible with the latest hardware.

Ubuntu, (based on Debian Linux) is today probably one of the most stable distributions. If one configures a machine with this distribution; is happy with the resultant initial configuration and does not want to receive further updates, one can configure the "update manager" not to check for updates.

The machine will remain stable as originally configured