Thank you very much for your answer.I have done just what you told the results were:1 - Malawarebytes didn't detect anything2 - Super antispyware detect Adware tracking cookie (I used this one once)3 - Microsoft Security Essentials detect a trojan Win32/Meredrop and removed it4 - Symantech didn't detect anythingAfter that my Firewall stoped apearing as it was inativated.But the problem I told before is the same - my MSN messenger does not keep my username and password and I have to write them everytime I start a session.I don't know if this is some kind of spyware or something like thatCan you help me ?Many thanks1 person needs an answerI do too

Shouldn't you be replying in the thread you started?

Well it's true but I'm not very familiar with this and I think I made a mistake because I didn't find the right place, I'm sorryLet's see if I can do it right this timeThank you