Acer Aspire 4339 Service Manual page 76

If user is unable to obtain correct password then it must be unlocked. There are two
methods to do this.
Method 1:
If BIOS menu item Power on Password is set to Enabled, then Crisis Recovery disc
must be used.
Method 2:
If BIOS menu item Power on Password is set to Disabled.
1. Press any key to exit the menu.
2. In DOS mode, execute ClearSuPw.exe.
Figure 2-20. Clear BIOS Password
3. When message Clear the SU Pws completely is displayed, user password has
been removed.
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