Quick fix Win7SP1 installation error 0x800f0a12

With the official release of Windows 7 SP1, most users have smoothly transitioned to SP1, but a small number of users have encountered problems during the upgrade process, which makes SP1 installation impossible. A problem that is currently known to be a headache is that the code is "0x800F0A12" errors during the installation process. Most of the users who have this error are dual systems, that is, Windows 7 plus other systems.
The main reason for this error is that the SP1 installer determined that the current system partition could not directly start Windows 7, thus interrupting the installation. (Microsoft's official instructions are that the installer failed to access the system partition to update the necessary files and the upgrade failed.)
If you encounter an SP1 installation error environment similar to the above, you can try the following solutions.
In the Start Search box, type “compmgmt.msc”Open the computer management interface, select Storage-Disk Management, and check whether the partition where Windows 7 is located contains the “activity” attribute. If not, right click on the partition and select “&ldquo ; Mark the partition as the active partition”.

the Win7 partition where the activity is set to close the Computer Management window and other applications after partition
complete, began running Windows 7 SP1 installation program updates online or directly through Windows Update, it will not be this time This error has occurred again.
After all the SP1 installations are completed, the original active partition can be reset to active status (if needed) via DISKPART.