Can not find the boot.wim installation file Win10 upgrade failure solution

With the official release of Win10, Microsoft has begun to push to the user batch by batch, but many of the friends who received the push encountered a lot of problems when upgrading Win10. For example, many users encounter Windows can not find the required installation file [boot.wim]. Please verify that the installation source is valid and restart the installation [error code 0x80070002]. How to solve this problem?

When you encounter an error, such as no boot.wim, you can solve it by the following method.

First step: First of all, you need to make sure that there is a hidden folder of \\$Windows.~BT, which can be found in the root directory of the C drive. To find the hidden file \\$Windows.~BT on the C drive and confirm that it is larger than 3G, it is understood that the current file size is between 3G and 6.9G. If you are not sure if it is downloaded.

Please open the C drive: window/SoftwareDistribution/Download/c9c1f550a73c72c48a98294db176f702ddb956a8 there is a big BT what is still there, then the proof is still downloading, and when it disappears, you can proceed to the next step.

Step 2: Copy the files in the hidden file of the C drive to any disk except the system disk.

Step 3: Find Setupup in the Sources folder to open in admin mode, and then you can install the system. (If you find that the file suddenly becomes smaller after opening, please go to the recycle bin to restore it).

If there is any operation, \\$Windows.~BT only has 10M left, delete the files in C:WindowsSoftwareDistributionDownload and \\$Windows.~BT folder, then refresh it\\ $Windows.~BT will reappear and wait for the download to complete.