I have the same problem. The program does not want to open after being installed. Recuva professional. It gives a similar message or the message that the program needs administrator permission. I have created a new administrator with a new password, suggested by Microsoft, but it still does not want to open. I have been trying for several hours now. Please help! It probably has something to do with WINDOWS XP HOME EDITION (SERVICE PACK 3) The program installed without any problems.