Many of these problems can be solved easily by resetting Windows Update!This will delete the update installation files and the update history and restore the update function.By visiting the Windows Update website, you will have two options: It is very important to install all the critical updates.

Therefore, you go to the Windows Update page and choose for Microsoft-Updates in the menu bar. If you have just reinstalled Windows XP, it's wise to update directly with the latest available Service Pack.Check out the add-ons as well and make sure the add-ons you need are enabled (Tools, Manage add-ons).If there are still troubles installing critical updates in spite of the above tips, you can disable the critical update.On the page how to optimize the Windows services, you can read how to disable the Security Center.If all critical updates are installed, check the optional updates to enhance your Windows system.