1. What updates are you trying to install?
2. Are you trying to install updates manually or through automatic updates?
3. When exactly are you getting this error?
4. What windows operating system is installed on your computer?
Try these steps.
Place your computer in clean boot and check for updates. Try step 1 from the article suggested below.
Put your computer back to normal startup after this step.
Try this step if the issue persists.
Run Windows Update troubleshooter if you are using windows 7 and check if it helps.
Open the Windows Update troubleshooter
If you are using windows XP or windows vista , reset windows update components using this link
How do I reset Windows Update components?
For additional information, you may refer the following links.
For Windows Vista:
Troubleshoot problems with installing updates
Install Windows updates
For Windows 7:
Bindu R - Microsoft Support.
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