It is nothing ~ My friend downloaded ring tones from one of website. After that he opened the ring tones but he missed with Adobe Acrobat Reader 8.0 to open it ..And then icons of all program from his window appeared like Acrobat Reader and he cannot open these .exe files ... :( .. now ok !
I cannot even call system restore and other Administrative tools ... but I inserted Window Vista (his window is Vista) DVD and call system restore from this DVD ... And I got it ...!