As you already know, Windows 10 build 10061 has been released and you can update it via the Windows Update feature. Beside that you can download a Windows 10 build 10061 ISO file for easy installation.

Windows 10 build 10061 error 0x8007002C - 0x4001C
Windows 10 build 10061 error 0x8007002C – 0x4001C

A known problem raise and the installation of update to build 10061 failed. The error message says:
Couldn’t update to Windows 10 Technical Preview
Sorry, we couldn’t complete the update to Windows 10 Technical Preview.  We’ve restored your previous version of Windows to this PC.
0x8007002C – 0x4001C
This known issue was report from Insiders, who updates from build 10049 to build 10061 via the Windows Update feature. Until now, we’ve not received any feedback from users updating from build 10041 or build 9926.
To solve this issue, please concern these question:
Have you tried running Windows Update Troubleshooter to see if there are issues?
Are all offered drivers installed?
If you still stuck at this, please feedback us via the comment section below.