As per some suggestions from good redditors here I installed Bitdefender, Kaspersky virus removal tool and now Malwarebytes. After the first two finished their work yesterday I think the trojan that infected my laptop was removed. And my lap began working smooth. However this morning when I woke up and began to install the third tool I saw that my audio was gone. “no audio output device is installed”. It was there yesterday though. What caused this? Should I be concerned. And is the trojan it something else on my laptop. When Malwarebytes scanned the laptop it found 254 something PUP stuff which I quarantined.