Microsoft BizTalk 2013 Accelerator for HL7

Hello experts,
This is the error that I have when I want to install BizTalk 2013 on my Windows Server 2012R2. I have no idea how to solve this or what should I do next. Can anyone help me please to fix this error ?
Thank you experts !

The specified account ‘MEDSOFTWAREHLLog” is invalid. Error code. The handle is invalid.
OK
