**** Bad RTC battery ****
**** Bad Checksum (CMOS) ****
Check system, then press [F1] key

This error can occur when a machine has been left turned-off for an extended period of time (approximately one to four months), and it is the result of a depleted RTC battery. Other symptoms include not being able to execute Windows Update properly, errors/problems executing application software (like Norton Antivirus), and the appearance of the Windows XP "Desktop Clean Wizard".

1. Reset the BIOS defaults
2. Set the correct date and time in Windows.
3. Charge the RTC battery

Please follow the detailed instructions in the next section.

1. Set BIOS defaults
   1. Press the [F1] key as instructed in the error message:

      **** Bad RTC battery ****
      **** Bad Checksum (CMOS) ****
      Check system, then press [F1] key
      

   2. In the BIOS setup screen press the [Home] key to restore the default values, then press the [End] key to save and exit, then the [Y] key to confirm and restart the system.

2. Set the correct date and time in Windows
   As Windows starts-up, you may see an error message about an "Invalid System Time". Go ahead and click "OK" to clear the error dialog.

   Open the Windows Control Panel and open the "Date and Time" control by double-clicking its icon. Set the correct date and time, then click OK to save.

3. Charge the Real Time Clock (RTC) battery
   To charge the RTC battery, connect the AC adapter and turn the computer on (both the DC IN and Power LEDs must be green). Leave the machine on for approximately 24 hours to ensure a full charge in the RTC battery. Please note that the RTC battery does not charge while the PC is turned off, regardless of whether the AC adapter is connected or not.

Other Information:
If, on subsequent reboots, the "Bad RTC Battery" error persists, it's quite likely that you actually do have a bad RTC battery. If that's the case, you should contact a Toshiba Authorized Service Provider to have the system serviced.

Windows XP Desktop Cleanup Wizard
The first time you reboot Windows XP after resetting the system clock, Windows XP may try to run the "Desktop Cleanup Wizard". Simply Cancel the "Desktop Cleanup Wizard" at the first dialog.

If you do manage to clean your shortcuts from the desktop and want to recover them, you will find them in a folder called "Unused Desktop Shortcuts". You can recover them as follows:

1. Double-click to open the "Unused Desktop Shortcuts" folder
2. Click to expand the "Edit" menu, and click "Select All"
3. Drag the selected items back to your desktop
4. Close the "Unused Desktop Shortcuts" folder. You can delete this folder if it is empty.

Note:

If, on subsequent reboots, the "Bad RTC Battery" error persists, it's quite likely that you actually do have a bad RTC battery. If that's the case, you should contact a Toshiba Authorized Service Provider to have the system serviced (the battery is not user replaceable).