this strange behavior make our team almost give up and reinstalling the windows, but at least we found the solution in this article :
Here is what we do to solved that:
- Download PsExec.exe from http://technet.microsoft.com/en-us/sysinternals/bb897553.aspx and copy it to C:\Windows\System32 .
- From a command prompt run: psexec -i -s -d cmd.exe
- From the new DOS window run: rundll32 keymgr.dll,KRShowKeyMgr
- Remove any items that appear in the list of Stored User Names and Passwords.
- Restart the computer.