I'm usingWindows 7Ulitmate Service Pack 1,and the need to encrypt the hard drive without some requirements. However,the encryption process is an error to turn on BitLocker. Any mind to solve this problem? wihout that error messages: "Bitlocker couldn't find target system drive. You may need to manually prepare your drive for Bitlocker"

Hi, Before encrypting C drive, you need to meet the following requirements. 1. The 100MB system partition must be created. 2. At least 10 percent of the active partition must remain free after the partition size is reduced by 1.5 gigabytes (GB). Please manage enough space on C drive, then open a command prompt with administrator privileges and run the following command. bdehdcfg -target C: shrink quiet -restart Hardware requirements for BitLocker Drive Encryption http://windows.microsoft.com/en-US/windows7/Hardware-requirements-for-BitLocker-Drive-Encryption Niki Han TechNet Community Support

Thank you @Niki Han, I resolved this problem. :)Tuguldur.j