Manual repair guide:
For Windows 8
Step 1: From Start, switch to Apps screen. Find out Windows System on the right, click Control Panel.
Step 2: Click Settings, click Change PC settings, click Update and recovery.
Step 3: Click Choose how updates get installed.
Step 4: From Important updates, select the option Give me recommended updates the same way I receive important updates, click Apply.
For Windows 7/Vista
Step 1: Click on Start menu, right-click on Computer, click Properties.
From System, select the Windows Update.
Step 2: Click Change Settings.
Step 3: Under Automatic Updates, verify that Install updates automatic (recommended) is selected. If not, select it.
Step 4: Select the frequency and time at which to install updates, and click OK.
For Windows XP
Step 1: Click on Start menu, right-click My Computer, and then enable Properties.
Step 2: From the System Properties box, select Automatic Updates.
Step 3: Under Automatic Updates, verify that Automatic (recommended) is selected. If not, select it.
Step 4: Select the time that you would like for the installation to take place, and click OK.