Windows 7 - Excel cannot open this file. The encryption type used is not available

Hi All, when i try to open an password protecttion excel sheet. It prompt me this message "Excel cannot open this file. The encryption type used is not available, contact the author of the files. More encryption types are available using the High Encryption Pack". When saving the excel file with password. It prompt me another message again, ""Excel is unable to encrypt your file. Please contact your system administrator to resolve this problem. Do you wish to remove encryption and try again? " Anyone has experience on this issue before? i am using ms office 2010 standard

Welcome to Windows Seven Forums.

Start Excel then click File>Info>Protect Workbook>Permissions>Encrypt with Password.

Delete the password already entered and click OK to remove the encryption.

If you are on a domain, you will need to contact your system administrator to see what restrictions have been placed on your account.

Hi, the notebook is on a domain, but when i using another AD account to login and try open a encrypted excel or word document, it prompted the same message.

You need to talk to your system administrator.