Edit:
JRE Installer doesn't start either.
Edit:
I'm actually in safe mode with internet connection and the installer still don't want to run... I don't know what to do now...I tried with "sfc /scannow" and it said there was no problem, I tried "DISM.exe /Online /Cleanup-image /Restorehealth" too, no problem got reported.
Edit:
I tried running the installer with a Guest account, nothing changed. Anyway I found a solution.