Failure to install SP1 on Windows 7 Professional: 0x800F0A12

I came across this problem today. This link guided me to the solution: http://windows.microsoft.com/en-US/windows7/windows-7-windows-server-20…

If you receive error "0x800F0A12" when trying to install Service Pack 1 (SP1) for Windows 7 or Windows Server 2008 R2, it means the SP1 installer can’t access the Windows system partition (sometimes called a volume) of your computer’s hard disk to update files.

Follow the instructions below to get more information about the error. Then, expand the section in this topic that corresponds to the message you receive and follow the instructions.

• Click the Start button , and in the search box, type command prompt.
• In the list of results, right-click Command Prompt, and then click Run as administrator. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
• Type bcdedit, and then press Enter.

I was receiving this error:
Error reads "The boot configuration data store could not be opened. The system cannot find the file specified."

Following the correct instructions, made me fix the update problem of SP1! Great support by Microsoft!