No it won't. If you run certain unreliable programs that try to mod your wii beyond that certain point, ur wii may run a risk of getting a little screwed. Like it can be risky to lower your system updates, you may run a risk of damaging your wii. Check around sites like smashboards and wiibrew when using an unknown hack to make sure it works if you arent for sure about it. If you are just stickin to homebrew, gecko, and other game hacks you should be fine though.