Windows 10 reboot loop after trying to reset to older version

Apr 4, 2018
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i had Sound issues with the newest windows 10 Version so i decided to reset to an older version, which already worked in the past. it worked, but some days later windows autoupdated to the newest version again with sound issues. so i Wanted to reset again to the older version. but now the computer is in an endless reboot loop, which takes around 8 seconds. it Starts the bios, the windows Logo and restarts as soon as the screen Shows the message: the previous version of windows is being restored