First of all, hello and thanks for your time. Ok, now, i have this problem with my machine, thats like the post from samm1. Basically i get the message "rundll32.exe - the application failed to initialise properly (0xC0000005)" when i try to open "add remove aplications" or when i try to run system applications. I made a scan with Hijackthis but i got different files than the post from samm1. I can post the log from hijackthis if you want. Thanks for your help Bye! Facu.