My friend's laptop was working fine but fine morning when he boot his hibernated laptop, he gets a blank screen with some EEPC error, so i suggested him to use the EEtech and decrypt the harddisk but in the decryption process when he click on REMOVE EE button after authenticatiion and authorrized, the screen got hanged and didnt move any further so, he just restarted the system after that i suggested him to use A4M option to backup the data, but when we reboot the system for the second time the A4M file management option is not recognising his harddisk itself. Even he tried to connect that harddisk to a another system as a external disk but still the harddisk is not recongnised..
But when i check the disk information in EEtech recovery window, it detects the harddisk as disk 0
Try changing the SATA mode to ATA in the bios first, then boot your EETech disk. You should be able to read your disk once authorised and authenticated.
Also, if you are using WinPE - you need to offline the disk before doing a "remove EE".
What was the EEPC error as there may be another solution.
Your WinPE CD is missing the SATA controller drivers for your laptop - either fix that, or put the controller into ATA/Compatibility mode.
As JM mentions - the exact error is required to properly diagnose the problem - if the "some eepc error" is "incorrect password", then decryption is not required.