I simply say: Why do not you read this before!
Brick Prevention- Things you should never do
Never uninstall your system menu
Your wii will not work very well without a system menu.
Never uninstall your system menu ios
Ios30, Ios50, Ios60, Ios70
Never uninstall any ios less the 200.
Ios files under 200 are important to the wii, it is very important you will brick. Never ever uninstall.