What fbl_release ?
Have you tried downloading build 10041 ISO and use it to install ?
http://windows.microsoft.com/en-us/windows/preview-iso-update-1503
If you did download the 10041 ISO, what method did you use to install ?
In case you don't know, your have 2 options :
1. Burn the ISO to a bootable DVD or an USB with at least 4 GB capacity, and then use it to do a clean install.
2. Just go to the folder where the downloaded ISO is kept > right click at it > click Mount > click Setup.exe.
The system will start installing and you can keep your personal files and settings. You might have to reinstall the 3rd party programs.
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Edited by
david hk129
47 minutes ago