start your computer then press "ctrl-alt-del" start task manager, look at processes and applications see if rivatuner has anything running if it does click end process on it. then go to the start button and then to the control panel then press uninstall a program, locate the program in the list and deleat it. see if that clears it up. i dont see how revatuner would screw up your sound and internet, also look at msconfig to see if it has any start up files related to revatuner. i used revatuner for quiet a while until i switched grapic cards and didnt have any problmems with it, hope that helps.