Windows 11 Insider Preview

At uupdump.net you can have a special script prepared that downloads the files for installing Windows 11 to your computer and then creates an .ISO file from them, the whole process takes about 30 minutes and at the end you get a bootable file .ISO file for Windows 11 installation.

On the page, first select which language you want to install, look for Czech under Czech, press Next, then select Edition e.g. Windows Pro and again continue with Next, on the last step of the page leave everything as selected and click on Create download packkage.

A small .zip file, which you unzip in its entirety and start preparing the ISO file by running uup_download_windows.cmd, this operation will take some time, you will know that everything is done by the fact that the command prompt will say Removing temporary files - Press 0 to Exit at the bottom. Then press 0 to shut down the program. The ISO will then be located in the running program folder.