If you can't uninstall them then you can try to turn them off, go to Settings -> Applications -> Application Manager (depending on Android version menus may be different).

Swipe from right to left until you get to All at the top from this list you can either Uninstall or Turn Off applications.  If you don't get the option to Turn Off an application then it is required to be running.  Don't be alarmed when you turn off an application when it uninstalls updates, it does that then turns off the application until such time you turn it back on. If you swipe one more time you will get to the turned off applications.