Port explorer questions and viral thing

Hi,
I have problems with some kind of virus, trojan, rootkit. Ocasionally, when i want to check my gmail acount via firefox browser this thing happens. When i'm writing down my email address, suddenly cursor jumps in to the place where i should write the password. The reason why i purchased port explorer licence was this incident. I am very dissapointed about purchase. In process log there is no process of a trojan... files conetcting to it's owner. I see only firefox.exe text in red for a moment. Here i have some print screens. I must come to the bottom of this problem. Sadly, i don't have enough knowledge to investigate this thing. I have latest and updated version of NOD32.... Hijack this shows nothing to be usefull in finding the cause of my case. Please help!

 

Then you really need to get someone who does have this knowledge to take a look at you machine - live - with them sitting in front of it.

Blue