This EE (McAfee Endpoint Encryption) thing is supposed to be a really intricate business encryption system, and it's most likely to be installed by a business technician who also has access to your recovery data/tokens to perform an emergency boot and decrypt the data. There are very indescribed instructions that explains how to do the process, but the one person most likely to solve this is the IT of your company if you have one. Or if you have the PC by yourself,did you use any security programs (like McAfee tools)? Because the emergency tool codes (which you need to run these tools) are given to IT techs only.