How do I update to Windows 7 Service Pack 1

Hi,
I am using Windows-7 ultimate.
Long before only (nearly more than 2 months before), I got the Windows 7 Service Pack 1 into my Windows Update folder. From then onwards, whenever I am trying to install this update, after long delay, I am getting the error message something like Windows update could not install this update. More than 10 times I tried.

What could be the problem? Can anybody please suggest what to do to solve this problem?

I am attaching the screenshot for your reference.

Thanks for your help.

Win 7 SP1 Issues.

* Clean up all Temp files...
Start > Run > % temp% > ok > organise > select all > organise > delete > some you may have to "skip"

* Run sfc scannow.
SFC /SCANNOW Command - System File Checker

*Now reset Windows updates.
How do I reset Windows Update components?


More links for you.

Download Details - Microsoft Download Center - System Update Readiness Tool for Windows 7 (KB947821) [August 2011]

Download Details - Microsoft Download Center - System Update Readiness Tool for Windows 7 for x64-based Systems (KB947821) [August 2011]

Steps to follow before you install Windows 7 Service Pack 1 from the Microsoft Download Center

ISC Diary | Windows 7 / 2008 R2 Service Pack 1 Problems

Windows 7 SP1 Installation Error - 0x80070002 - ERROR_FILE_NOT_FOUND

Trying to install Windows 7 Service Pack 1 SP1 error 80070002

Windows 7 Service Pack 1 is Released: But Should You Install It? - How-To Geek

karlsnooks said:

If the FixIt doesn't work,
then use
METHOD 2 of this Microsoft KB
Description of the System Update Readiness Tool for Windows Vista, for Windows Server 2008, for Windows 7, and for Windows Server 2008 R2

Download the System Update Readiness Tool appropriate for your system.

+1 :) This is an excellent step for this error.

@kakmca: Please follow all of the above advice from all three posts, and once you have run the System Update Readiness Tool, please upload your C:\Windows\Logs\CBS\CheckSUR.persist.log.

Thanks a lot!

Richard