Problème de démarrage

>update to Microsoft Office (Word, Excel, etc.)

I have Microsoft Office, and I have never had a problem with any other program after an Office update... but I suppose it is possible if the Office update was part of a Windows update and a DLL update is causing a problem

Try uninstalling and reinstalling Photoshop Elements and Premiere Elements.

I'm not sure how it works in your country.  In the USA, there is an online help system where Adobe techs can fix installation problems.  Try a google search for Adobe customer service.   You should arrrive at a website that looks like this one:    https://helpx.adobe.com/contact.html

There should be a icon in the lower right corner that will start a chat session:  

Translation - Since the installation of the office pack 2 days ago

What is an office pack? Is that a Mac-or-Windows update?

When you ask a question you always need to provide some basic information
-Forum quick start https://community.adobe.com/t5/Community-Help/ASK-Forum-Success-Guide-Efficiently-using-the-forums/td-p/4791542
-https://community.adobe.com/t5/Get-Started/Questions-you-need-to-answer-to-receive-better-help/td-p/6199470
-https://community.adobe.com/t5/get-started/how-to-post-and-get-your-issue-resolved-or-what-do-you-need-to-know-to-solve-my-issue/td-p/11178657?page=1