Problem:

My computer keeps trying to install an update that it keeps failing on. I get a code 646 error saying windows updated encountered an unknown error when im trying to install the office 2003-mircosoft office outlook 2003 junk email filter.

Workaround 1:

Turn off UAC (use MSCONFIG)

1. Click Start. Type MSCONFIG in the Start Search bar and press Enter.

Note: If UAC window prompts for permission to continue, please click Continue.

2. Click Tools.

3. Highlight Disable UAC, click Launch.

4. Restart the computer and test the issue again.

Note: If you turn on UAC, please launch Enable UAC

If the steps do not work, let's refer to the following steps to manually download and install the updates.

Workaround 2:

Manually download and install updates:

1. Visit Microsoft Download Center: http://www.microsoft.com/downloads

2. Use the IDs of Windows Updates to find the download links. For example, you can use the key word KB972363 to find the link to download update 972363.

3. Download updates from the links and save them to the desktop. Double click on the installation files and install the updates manually.

 

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