Hi Francois,
The werfault.exe is used for Windows Error Reporting. It is a feature that allows Microsoft to track and address errors relating to the operating system, Windows features, and applications. It gives you the option to send data about errors to Microsoft and to receive information about solutions. Look in the Event Log which applications crash.
As a initial recommendation, we suggest that you try turning the Windows Error Reporting service to off temporarily and see if it will fix the problem.
- Click Start and type services in start search and press Enter.
- Locate Windows Error Reporting service in the services list.
- Right-click on it and click Properties.
- Open "Startup type" list and select "Disabled" and click OK.
- Check and see if you are still getting the werfault.exe error.
If the issue persists, we recommend that you perform a clean boot. This helps eliminate software conflicts that occur when you install a program or an update or when running an program.
If in case that you're still getting an error after performing the steps above, it would be best that you post your query on TechNet forums. This forum is catered by IT Professionals which are capable of handling such cases like deploying Windows to multiple computers using images, hardware and software compatibility, client security issues and so on.
Note: Please go through the section:How to reset the computer to start normally after clean boot troubleshootingof the Kb article to boot the computer in normal startup after fixing the issue
Should you have other concern, feel free to post back.