For the error code A97, you would need to have your Office install media inserted into the CD/DVD Rom while the update(s) are installing. If that's a Dell machine you probably don't have the media as Dell is pretty adamant about keeping that for themselves (for whatever reason). If yours is a trial version, you would be better off to just uninstall it, then try Windows Updates again. Of course, those updates would no longer be offered, thus that particular error would disappear in that case.
If yours is NOT a trial version and you fully intend to use it and keep the license up to date, then you need to contact Dell and ask them how they intend to fix your issue for you...Don't be surprised if they tell you to contact Microsoft. Passing the buck these days is fairly common.
The definition of the error code you’ve received 0x80070641 can be found below:
ERROR_INSTALL_SERVICE_FAILURE - The Windows Installer Service could not be accessed. This can occur if the Windows Installer is not correctly installed.
If you can successfully install applications that rely on the Windows Installer then the service itself is most likely functional, and was simply in use at the time of the update. Thus, you will want to make sure that the Windows Installer service is not in use prior to attempting updates.
If the issue persists after you’ve confirmed no installations are taking place proceed with the troubleshooting below.
How-to stop the Windows Installer service.
If you are sure no installations or configurations, which rely on the Windows Installer, prior to updating you can try manually stopping the Windows Installer service, and then attempting Windows Update. If the error code persists after that the issue may be related to a corrupt or otherwise damaged Windows Installer.
Stop the Windows Installer service and then use Windows Update…
1. Click Start, click All Programs, click Accessories, right-click Command Prompt, and select Run as Administrator.
2. At the Command Prompt window type the following, and press Enter:
3. net stop msiserver
Note: This will effectively stop the Windows Installer service. This service will load-on-demand so manually stopping it does not adversely affect the computer.
4. Launch Windows Update, and then attempt to install the previously failed updates