Flash player win 8.1

Hello, I try in English but i préfère in french:

My browser
Internet Explorer 11

My Operating System (
Windows 8.1

I have a new computer I had try to réinstall flash player  after flash player would not run again. (this problem seem to begin after i have try install and uninstall last ad block engine because he wouldnt run, this  unrun may be come from anti-virus, avast block run ?!) But at the Add ON Tools (right up explorer corner) shockwave flash object are enabled (and active x off), but when i test flash player at adobe(Problèmes d’installation | Flash Player | Windows i seen this message:

Your Flash Version
Flash Player disabled

How to réinstall flash player ? i think is the best question for now ? Thanks for your help not for the problem

Nom :                       Shockwave Flash Object

Éditeur :                   Microsoft Windows Third Party Application Component

Type :                      Contrôle ActiveX

Architecture :              32 bits et 64 bits

Version :                   18.0.0.160

Date du fichier :           ‎mercredi ‎3 ‎juin ‎2015, ‏‎18:18

Date du dernier accès :     ‎mardi ‎30 ‎novembre ‎1999, ‏‎01:00

ID de classe :              {D27CDB6E-AE6D-11CF-96B8-444553540000}

Utilisations :              0

Nombre de blocages :        0

Fichier :                   Flash.ocx

Dossier :                   C:\Windows\System32\Macromed\Flash