J'ai trouvé ca sur le site de Oracle (java)
https://www.java.com/en/download/help/exception_access.xml
Ils recherchent la cause mais apparemment il existe une solution:
This issue could be seen due to User Account Control (UAC) feature enabled on Windows Vista or Windows 7 operating system.
UAC is enabled by default in Windows Vista and Windows 7, as a result, you might encounter some compatibility problems with different applications that have not yet been updated for the Windows UAC component
Temporarily disabling UAC may resolve the exception access issue, however, turning off UAC reduces the security of your system. We do not recommend leaving UAC disabled.
Autrement un windows corrompu ne ferait pas la même erreur z?