Win8.1 subscription upgrade Win10 failed solution

Solution:

After the user downloads the Temp10 installer to download the temporary folder "C:$Windows.~BT” (hidden system folder) to other partitions, start the source The setupre.exe program in the folder can be installed normally.

Note: If your <quo;C:$Windows.~BT” folder is not complete, it is likely that the download has not been completed. Note the Windows Update ID on the right side of the taskbar. If it exists and prompts you to download the percentage of updates, you should not do this. After the prompt disappears, entering the folder will reveal that the contents of the file are very similar to the Win10 system image.

Tips: $Windows.~BT” The folder will disappear in some cases, which has a lot to do with its "temporary" attribute. The root cause of this problem is that the system believes that the file in the folder has “completed the mission”; therefore, the content will be deleted, but from the feedback of “Installation Failure”, this is obviously a serious mistake. Therefore, in order to prevent the abnormal problem caused by this folder property problem, you can consider putting the files in the copied folder into the normal folder or changing the folder properties after copying. Remember, don't make any changes to the original “$Windows.~BT” folder to avoid affecting the normal upgrade channel.
▲The original 6GB or more folder is inexplicable with only 140MB