Uninstalling PR keeps emptying my HDD

[Rebond]

Hello everyone,

I juste created an account, in order to share my issue.
10 minutes ago, for the second time, uninstalling PR (from the control panel) emptied my hard drive. The first time I lost 500Gb of datas.
I thought that it was CCleaner's fault the first time, so today I used the control panel. But the same thing happened: I selected PR, clicked uninstall, an odd long time happened, and my hard drive was now free of a lot of space. It uninstalled my Steam games, and all of my programs.

I was wondering if I'm missing something ?