Win8.1 upgrade Win10 official version 0x80070002 error solution

In the process of upgrading the official version of Win10, some Win8.1 users encountered a 0x80070002 error during the installation restart. After the error occurs, the upgrade will fail and automatically fall back to the Windows 8.1 system.

One of the reasons for this problem may be because of the addition of another drive. According to an industry insider in the Microsoft community, if your computer used HDD mechanical hard disk as the primary hard disk and later added and enabled the second hard disk, such as SSD solid state hard disk as the primary hard disk, it may lead to Win10 installation. The program does not recognize the current partition information well, causing the installation to fail.

The solution is not difficult. The easiest way is to back up the useful information of the previous master hard disk and then re-partition and format it to avoid the residual boot information disturbing the Win10 installer. Or "unmove" the non-bootable hard disk before installing the system, and then connect and install it to solve the problem.

Another reason is the interference of non-Microsoft services. The solution is to prevent all non-Microsoft services from starting. You can enter MSConfig in the Cortana search bar and enter "System Configuration" and then find "Services". After clicking "Hide All Microsoft Services" in the lower left corner, disable all services that still exist. Then restart your computer and try to run the installer again.

In addition, some third-party anti-virus software and security software may also hinder the normal operation of the installer, resulting in a similar situation. Therefore, in order to be on the safe side, you should disable all the real-time monitoring programs for killing soft before upgrading Win10, or even temporarily uninstall the soft-software. After the Win10 upgrade is successful, you can re-install it.