Hi David,
The issue may be caused by an improper Windows Update installation. For example, a Windows Update installation interrupted by a crash may result to a corrupted system file. A third-party program conflict can also be the reason for this error.
Let us narrow down the possibilities why your PC encountered this issue. You can follow the troubleshooting steps below:
- Temporarily disable your antivirus program before running the Windows Update.
- Visit the article on how to perform a clean boot in Windowsand follow the steps provided under the Windows 7 and Windows Vista section This helps eliminate software conflict that occurs when you install a program or an update. You may also determine what conflict is causing the issue by performing this method.
- Fix Windows Update errors. Since you are using Windows 7, you can do this by running the Windows Update Troubleshooter. To download the Windows Update Troubleshooter, click on this **link**.
- Restart your computer for the changes to take effect and try updating Windows again.
Note: After doing the steps above, you can enable your antivirus program again.
Keep us posted if you encounter any challenges along the process.