LG Gram 17Z90N Series Easy Manual page 179

4
Press [Next] to proceed with installation as guided.
Remove everythings
Removes all items from the system and restores the system to its initial pre-purchase state.
CAUTION
All data is lost during the initialization, so you must backup all critical data in advance.
It may take about 5 hours or longer depending on the system conditions.
179
Restoring the System