Mince excusez moi ils mettent aussi :
1. Disable UAC (not recommended ).
2. Move Nexus Mod Manager's Install Info folder outside of the Program files folder (for exemple, to C:/Games/ModManagerInfo/InstallInfo).
3. Run Nexus Mod Manager as administrator. you can try this by
right-clicking on NexusModManager's shortcut and selecting Run as administator.Alternatively, right-click on the shortcut, select Properties--Comptability and check Run this program as an administrator.
The best thing to do in order to avoid other problems, and the generally recommended solution, is to move Nexus Mod Manager's Install Info Folder outside of the Program Files folder.