Should I format the drive... is it the better solution?
Thanks in advance!
I had the same problem as you, and I had to format my HD. I couldn't find a way of getting rid of the trojan, in spite of the help I got here. It took me some time to backup all the stuff, but it also "forced" me to do some cleaning, which is good, if you have some time. If you do format, be careful and prepare yourself before you do so: you should install an updated antivirus, a firewall and have all the latest patches for Windows XP installed before you connect to the internet again. Or you might get infected again...