EXFO FTB-500 - Manual (Page 309)

Troubleshooting
FTB-500 301
Restoring Your Unit to Normal Operation
To revert your unit to a previous state:
1. Ensure that your unit will remain powered on during the operation by
connecting it to a power outlet using the provided AC adapter/charger.
2. If desired, back up your data.
Note: If you want to have a look at the content of the Windows.old folder
containing files of the previous installation, go to the root of the C drive
(Windows (C:)). If you do not see the Windows.old folder, it means no
refresh operation has ever been performed on your unit.
3. On your unit, from the right side of the screen, swipe left to display the
Charm bar.
C
AUTION

Before starting one of the recovery operations, connect your
unit to a power outlet using the provided AC adapter/charger.

DO NOT TURN OFF your unit while the recovery operation is
underway. Doing so may severely damage your unit. Damaged
units will need to be sent back to EXFO for repair.
I
MPORTANT

Refresh operation: All the data that is stored in the default
personal folders will still be available once the operation is
complete. However, any data stored in other folders will be lost.
You may want to back up this data before refreshing your unit.

Reset and restore operations: To avoid losing the data that is
stored on your unit, you may want to back it up before
resetting or restoring your unit. Otherwise, all your files will be
lost.