Hi, @Mirna Najim
Thank you for posting in Microsoft Q&A forum.
Upon checking Apps & features, I noticed that there are two Dell applications listed (as shown in the image below).
We cannot see the image, could you add the image for us?
The error 1603 may means you so not uninstall the old version correctly, so it failed to install the new version.
So you may need to check your script to make sure it can uninstall the old version totally.
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