If you have had issues installing the 10041 and/or the 10049 builds of the Windows 10 Technical Preview due to low storage space, Microsoft has posted a workaround that might solve that problem.
Some Windows Insider members have been reporting that the two recent builds of the Windows 10 preview either cannot install at all due to "insufficient disk space" or that the amount of time needed to install the builds takes much longer than usual, with some taking hours to complete.
If that sounds similar to your experience, Microsoft says in a community forum post that your issues may be due to a bug that is causing some installs of Windows 10 to also include all of the operating system's language packs. The issues are also causing some files to appear on the desktop or in File Explorer.
Basically, the solution is simply to get rid of any language packs that you don't think you will need. Microsoft offers the procedure for this file deletion:
- Open a command prompt as an administrator
- Bring up the interface for uninstalling language packs by typing the following command and press Enter: Lpksetup /u
- Select the language packs you want to uninstall.
Hopefully this simple workaround should solve the Windows 10 install problems.
Source: Microsoft Community