オリジナル投稿者： iMedic ,
Ok. First start with turning it off and on again. Then try a force restart To force restart your device, press and hold the Volume down key and Power/Lock key on the device for 10–20 seconds. This performs a simulated battery disconnect If that doesn't take, then you'll likely have to restore, which you'll want to backup your data From a Home screen, tap Apps . These instructions apply to Standard mode only. Tap Settings. From the Personal section, tap Backup and reset. Tap Back up my data to turn on or off . Tap Backup account. Tap the appropriate account. Tap Automatic restore to turn on or off.