Welcome to Android Central! Try booting into Recovery Mode and wiping the system cache partition, which won't erase any personal data.
1) Ensure the handset is powered off
2) Hold down the Vol Down button and press the Power button until you see the Fastboot menu.
3) Use Vol Down to highlight "Recovery," then press the Vol Up button to select.
A picture of an Android will appear in the screen with a "!" symbol.
4) Press Vol Up and Vol Down simultaneously.
A blue Android system recovery menu will appear/
5) Use the Volume buttons to highlight "wipe cache partition," then press Power to execute.
6) When that's complete, select "reboot system now," then press Power to execute.
Thanks to this site, where I found these steps:
http://forum.gsmhosting.com/vbb/f783/factory-reset-razr-i-xt890-done-1764018/