As just said in my introductory lines - keep my fingers crossed that everything is just fine with my PC now. I followed step-by-step the 8-step Viruses/Spyware/Malware Prelimiary Removal Tool. No doubt, I shall be using the installed programs from now on, because there isn't always going to be enough time to look for the suitable remedy. At that moment everything seems safe and sound - no more sign of the viruses and/or the rootkits I had before. Thankful to all of you who had worked on the issue and shared the expertise. Here I do attach an Avast log where the infections (that my PC used to have) are listed, and a hijackthis.log showing the results after the 8-step Viruses/Spyware/Malware Prelimiary Removal Tool has been executed twice. The other two logs - namely the SUPERAnti Spyware one and the Malwarebytes' anti Malware one, show no evidence of infections. Please, I need your feedback is everything there OK or else - some suspicious lines are present... Thank you in advance.