If you attempt to run Bit Locker Drive Preparation Tool on Windows Vista with SP2 installed it will produce an error.  The problem is with the installer package. You can uninstall SP2 or perform these steps to bypass the error by extracting the install files:[more]

  • After downloading Bit Locker Preparation Tool to the C: drive. Run the following at the command prompt.
  • expand -f:* "C:\Windows6.0-KB933246-x86.msu" %TEMP%
  • pkgmgr.exe /n:%TEMP%\Windows6.0-KB933246-x86.xml
  • Run “C:\Program Files\BitLocker\BdeHdCfg.exe” and it will repartition your drive to allow Bit Locker to work properly.