Windows 7 SP1 released to the public this week and available for download. Although it does not come with any new features, it includes all the previous updates which was delivered through Windows update. Here comes the actual problem regarding the installation of Windows 7 SP1. If you are a regular updater of Windows 7 in the past and your PC performs well,then there is no need to install Windows 7 SP1 because there is no additional features for a ordinary user.
If u never updated your PC in the past,find a best way to install Windows 7 SP1 correctly without an errors.

Windows 7 SP1 Installation List of Problems you may face
Problem 1: Installation Error: 0x800F0A12. If you receive error “0x800F0A12″ when trying to install Service Pack 1 (SP1) for Windows 7 or Windows Server 2008 R2, it means the installer can’t access the system partition of your computer’s hard disk to update files. Microsoft has detailed on how to solve the issue.
Problem 2: “Installation was not successful” error message due to your Antivirus,Anti-Spyware programs and inconsistency in the Windows Servicing Store. System Update Readiness Tool can help fix problems that might prevent Windows updates and service packs from installing.
Problem 3: If you try to install SP1 with Microsoft Security Essentials or Microsoft Forefront Client Security already installed on your computer, your security program might prevent the successful installation of the service pack. So uninstall the two and install it later.
Problem 4: “Windows has detected unsupported languages files” error message. Choose the standard Languages in W7 and start the installation
Problem 5: Samsung Galaxy S phone drivers, Chrome 10 and 11,EVGA Precision Utility 2.0.2, and Third Party firewalls may cause the installation error in Windows 7 SP1.
Problem 6: Windows 7 Update error code FFFFFFFE. This problem is usually caused by a virus infection.To solve this problem, the recommended method is to reinstall Windows 7 using the Custom installation option and format the hard disk.
Problem 7: Windows 7 Update error is 84C40007 (for Windows Server 2008), which means an update to SQL Server 2008 can’t be installed because of a problem with a .NET Framework installation. To solve this problem, you need to install the full Microsoft .NET Framework 4 package.
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Problem 3. So lets get this straight the security software released by Microsoft prevents the service pack from installing. Facepalm.
yeah it seems…
This method works without Safe Mode, without backups, without System Restore, without DISM, and without a Windows 7 DVD repair disc.
INSTRUCTIONS:
01. Reboot your computer while it’s starting up.
02. When your computer starts up again, choose the option “Launch Startup Repair”
–> PIC: http://notebooks.com/wp-content/uploads/2011/01/Recov-1.jpg
03. When the Startup repair starts, click cancel.
04. After you click cancel it will show a box. Click “Don’t Send”
–> PIC: http://i52.tinypic.com/xgjriw.png
05. Click the link “View advanced options for recovery and support”
06. In the new window click Command Prompt at the bottom.
–> PIC: http://i51.tinypic.com/50imu8.png
07. In Command Prompt type this and press enter: %windir%\system32\notepad.exe
08. Notepad will open. In notepad go to File–>Open.
09. Change the type of files notepad views from .txt to All Files (see pic)
–> PIC: http://i51.tinypic.com/35nd74z.png
10. Now in Notepad, go to C:\Windows\winsxs\ (or whichever drive Windows is installed on)
11. In that folder, find pending.xml and make a copy of it
12. Now open the original pending.xml (it will load really slow because the file is huge)
13. Press CNTRL+F and search for the following exactly: 0000000000000000.cdf-ms
14. Delete the following text (yours will be a little different):
–> PIC: http://i54.tinypic.com/adzpzp.png
Your PC might not have all 3 sections of code (, , ). Just make sure you delete section “Checkpoint” and whatever other sections have “000000000000000.cdf-ms”. They will be right next to eachother.
15. Save the file, close notepad, close command prompt, restart your computer.
I installed sp1 on win 7 toshiba satellite L650 laptop, the computer being brand new and hardly anything installed besides the factory settings (except avast…). It installed slowly. Then at fisrt startup I wasn’t allowed access to anything because didn’t have the right level authoruisation (this was inside my account which is the administrator’s account). I did a restore from recovery discs. Then reinstalled sp1. Same problem. I am now doing a complete computer repair to see if I can get round the problem. Luckily I found the Toshiba hdd recovery option – because I have also lost the f8 key function: I pressed it many times after many reboots but it never gave me safe mode or anything else (no computer repair options,…) – the computer just went on and started windows up and then I got to the first page with teh icon of my account – it just skipped F8 altogether.
I hope things will be ok (I have no experience of computer repair at all). What do you think?
Thanks for reading.
Super, it works perfectly, only difference was that our C drive was empty, but we found windows on the drive labeled ‘OS’. Tried this instruction on two HP machines.
There are more errors, have got “Fatal error C0000034 applying update operation 242 of 73674″ and windows just doesnt continue. What am I supposed to do? Pl advise urgent…