1. Log on to the computer by using an account that has administrator rights.
2. Click Start, type “msconfig.exe” (type without quotes) in theStart Search box, and then press ENTER to start the System Configuration Utility.
3. If you are prompted for an administrator password or for confirmation, type your password, or clickContinue.
4. On the General tab, click Selective Startup, and then click to clear theLoad startup items check box. (The Use Original Boot.ini check box is unavailable.)
5. On the Services tab, click to select the Hide all Microsoft services check box, and then clickDisable all.
Click on “Apply” and “OK”. Restart the computer and try performing Windows Update.
How to set your computer back to boot normal after windows update:
6. Click Start type msconfig.exe in the Start Search box, and then press ENTER.
7. If you are prompted for an administrator password or for confirmation, type your password, or clickContinue.
8. On the General tab, click the Normal Startup option, and then clickOK.
9. When you are prompted to restart the computer, click Restart.
Please look at this link for more information http://support.microsoft.com/kb/929135
Step 2: Reset the Windows Update components
1. Please click on the following link:
2. Scroll down the page and click the Fix it button or link.
3. Click Run in the File Download dialog box, and then follow the steps in the Fix it wizard.
4. Try installing Service Pack and update us on the status.
Step 3: Run SFC scan, using the following steps:
1. After Step 3, please click onStart and type cmd and right click on cmd and hit run as administrator.
2. A dos window will open there type “sfc /scannow” (without codes) after it completes please restart the computer once.
3. After that, let us try to run System Update Readiness Tool to replace incorrect data, corrupted files and registry keys on the system. I have included detailed steps below.
Please look at this link for more information http://support.microsoft.com/kb/929833
Step 4: To turn UAC on or off
- Open User Account Control Settings by clicking the Start button, and then clickingControl Panel. In the search box, type uac, and then clickChange User Account Control settings.
- Do one of the following: