Click one of theDownloadlinks on this page to download a special file—it’s called an ISO file—that you can use to install the preview.
When the download is complete, transfer the ISO file to installation media such as a USB flash drive or DVD.
Boot your PC from the installation media, and then follow the steps to perform a clean install.
If you are already on Windows 10 Technical Preview Builds,
If you’re currently configured for the Fast, the build is available now.
Just like last time, this new build will come to you automatically via Windows Update, installed during your maintenance window if your PC is plugged in and on or sleeping.
If you don’t want to wait for it to download and install on its own – you can go to PC Settings, Update and recovery, Preview builds and click the Check Now button to go get it now.
This is a full build, and it will be installed as an in-place upgrade, so you’ll go through those colorful “installing your apps” screens again. This is because your account is being re-provisioned after the upgrade.
Update:There is no ISOs for Windows 10 Build 10041. You need to update through Windows update.
Update 2:There is a community built ISO to install Windows 10 Build 10041. Find more detailshere.