I am receiving 0X80070490 error in Windows 8.1 task sequence on Lenovo T450s. Task Sequence has been configured to Activate TPM prior to applying operating system to pre-provision bitlocker. Detailed error shown below: Your help in this matter greatly appreciated. Error does not occur when system has been configured to use legacy BIOS. seems issue is related to UEFI boot.

![LOG[Checking to see if the data path is on a bootable volume]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="1" thread="780" file="bootimage.cpp:1014">
<![LOG[ Volume C:\ because it is not suitable as the system partition]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="1" thread="780" file="bootimage.cpp:395">
<![LOG[Searching for a volume to stage the boot image]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="1" thread="780" file="bootimage.cpp:1038">
<![LOG[ Volume S:\ is not NTFS]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="1" thread="780" file="bootimage.cpp:366">
<![LOG[ Volume C:\ because it is not suitable as the system partition]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="1" thread="780" file="bootimage.cpp:395">
<![LOG[ Volume X:\ is not on a fixed disk]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="1" thread="780" file="bootimage.cpp:346">
<![LOG[BootImage::FindBootableVolume( NULL, sPath), HRESULT=80070490 (e:\qfe\nts\sms\framework\tscore\bootimage.cpp,1045)]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="0" thread="780" file="bootimage.cpp:1045">
<![LOG[Unable to find a volume that is suitable for staging the boot image. 
Element not found. (Error: 80070490; Source: Windows)]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="3" thread="780" file="bootimage.cpp:1045">
<![LOG[BootImage::PrepareForStaging(sLocalDataPath), HRESULT=80070490 (e:\qfe\nts\sms\framework\tscore\bootimage.cpp,719)]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="0" thread="780" file="bootimage.cpp:719">
<![LOG[TS::Boot::BootImage::StageBootImage(sBootImageID, StageBootImageProgressCallback, (LPVOID) m_sStageBootImageMessage.c_str()), HRESULT=80070490 (e:\nts_sccm_release\sms\client\tasksequence\executionengine\engine.cxx,831)]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="0" thread="780" file="engine.cxx:831">
<![LOG[Failed to stage a boot image P0100074. 
Element not found. (Error: 80070490; Source: Windows)]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="3" thread="780" file="engine.cxx:831">
<![LOG[Failed to reboot the system. Error 0x(80070490)]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="3" thread="780" file="engine.cxx:953">
<![LOG[RebootSystem(pwszRebootMessage, dwRebootTimeout, dwRebootReason, bRebootWinPE), HRESULT=80070490 (e:\nts_sccm_release\sms\client\tasksequence\executionengine\engine.cxx,577)]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="0" thread="780" file="engine.cxx:577">
<![LOG[Failed to initialize a system reboot. 
Element not found. (Error: 80070490; Source: Windows)]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="3" thread="780" file="engine.cxx:577">
<![LOG[CheckForRebootRequest(&bRebootInitiated), HRESULT=80070490 (e:\nts_sccm_release\sms\client\tasksequence\executionengine\engine.cxx,273)]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="0" thread="780" file="engine.cxx:273">
<![LOG[Fatal error is returned in check for reboot request of the action (Restart Computer - Enable TPM). 
Element not found. (Error: 80070490; Source: Windows)]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="3" thread="780" file="engine.cxx:273">
<![LOG[An error (0x80070490) is encountered in execution of the task sequence]LOG]!><time="10:38:56.777-600" date="06-02-2015" component="TSManager" context="" type="3" thread="780" file="engine.cxx:348">