loustalou1

Thank you Imacri for all your explanations.

Hello, Some time ago, when using CCleaner's registry cleaning, the tool offered to delete a bunch of keys relating to the "Dell Support Assist" application installed on my pc. Before proceeding with this operation I have, as proposed by the tool, a recording of the modifications. After performing the cleanup, I no longer had access to "Dell's Support Assist". And when I wanted to restore the file saved by CCleaner, it was impossible. I do have admin rights though. Also, I was unable to reinstall Dell's application. This is the first time I have a problem using CCleaner. I had to call Dell support to fix the problem. What happened ? Why did the registry cleaner offer to delete keys useful for the operation of an application and why was I unable to restore the deleted dlls? Thank you in advance for your cooperation. André