Unauthorized windows update

Click Start button. Type "windows update" in the box. Click "Windows Update" under Programs. Open Internet Explorer. To resolve your issue, we need to get the file's Signature Hash to match what is listed in Windows Vista System Catalog. I can provide a couple of suggestions to do this:. A Uninstall Update KB :. Reboot Windows Vista into Safe Mode. Go to Control Panel. On the left hand side of the Controlee panel window, Click Classic View. Double-click Programs and Features.

On the left hand side, under "Tasks" click View installed updates. Sort the updates by "Installed On" date. Find the Updates installed on or after April 8 th. Right-Click on the Update and select Uninstall. Reboot into normal mode. When the update is complete, reboot the computer. When the computer reboots, you should see a screen that says something like "Configuring Update Ensure that you have the latest Windows Update Agent installed on the device.

You might encounter this error when WSUS is not sending the self-update to the clients. Review KB for instructions to resolve the issue. This issue occurs because Windows can't renew the cookies for Windows Update. A servicing operation is taking a long time to complete.

The servicing stack watchdog timer expires. Extending the timeout will mitigate the issue. Increase the resources on the device. If a virtual machine, increase virtual CPU and memory to speed up operations. Make sure the has installed the update in KB or later. Typically this is due component store corruption caused when a component is in a partially installed state.

Repair the component store with the Dism RestoreHealth command or manually repair with a payload from the partially installed component. The servicing stack watchdog timer expires and assumes the system has stopped responding.

Make sure the device has installed the update in KB or later. Repair the component store with the Dism RestoreHealth command or manually repair with the payload from the partially installed component. Repair the component store with Dism RestoreHealth or manually repair with the payload from the partially installed component. File system or registry key permissions have been changed and the servicing stack doesn't have the required level of access.

This error generally means an access was denied. After finding the error, scroll up and try to determine what caused the access denial. It could be acess denied to a file, registry key. But this may change the firmware signature, making you receive the error message of the system found unauthorized changes on the firmware operating system or UEFI drivers. In a situation like this, this message is not harmful. You still boot the system successfully and use the computer as normal.

If you are using Windows 7 or an older version and you have installed a pending Windows update, this issue can easily happen. The system bootloader may be replaced with another one that is improperly signed by Microsoft. But you need to make sure that you have create a system restore point this post also shows you how to perform a system restore before.