haywire
/ˈheɪˌwaɪər/
adjective
- Not working correctly; out of control or behaving in a crazy or unpredictable way.
- After the power surge, the entire security system went haywire and set off false alarms.
- The sound system at the concert went haywire, producing loud static instead of music.
- My computer went haywire and started deleting all my files.