Acer Aspire E1-521 Acer Aspire E1-521 Notebook Service Guide - Page 66

5. On a separate computer, boot into Windows OS. Copy the file "UnlockHD.EXE" to the root directory of a DOS-bootable USB disk. Figure 2:37. Copy UnlockHD.EXE 6. Boot into DOS with the USB disk on any machine, then execute UnlockHD.exe to generate the HDD Unlock Password. Use the following command: UnlockHD [Unlock Key] with the code noted in step 3, Figure 2:33. Figure 2:38. Execute UnlockHD.exe 7. Take note of the generated unlock password. 8. On the target machine, repeat steps 1 ~ 3, and then enter the HD Unlock Password obtained in step 6 to unlock the HDD. Figure 2:39. Enter Unlock Password NOTE: After unlocking the HDD password, the HDD may be in a "Frozen" state. Power off the system and then power on again to return the HDD to its normal state. Figure 2:40. Enter Unlock Password 2-25 System Utilities