Tu mas navod v ENG ako to prinutit na upgrade na Windows 10 z Windows 8.1 -->

1. make sure your system is set to receive and install Windows Updates automatically
2. delete everything in the C:\Windows\SoftwareDistribution\Download folder
3. run this command in an instance of cmd.exe ran as administrator: wuauclt.exe /updatenow
4. you should be all set and your download should begin shortly.

If you’re having problems following these directions, make sure to head over to the source link where you will see more detailed instructions, as well as screenshots.