Installation error for SAP CE 7.2 Trial

Hello,

I would like to instal SAP CE 7.2 Trial on my PC (XP Pro SP3).

I have this message error :

Modifying the USER AUTORITE NT\SERVICE LOCAL failed. Original error message was:

ind-rel.ind-os.ind-db.j2ee-eng.emptyPassword:

Password for user 'AUTORITE NT\SERVICE LOCAL' is empty.

SOLUTION: Modify the account manually and choose OK to continue. If you choose Cancel, the installation will be aborted.

Do you know why and what to do ?

Regards