I don't know how I may be got attacked with malware, but my laptop is slowed down to hell. I checked the Task Manager, there I found that a command line "C:/Windows/system32/taskkiller.exe" is taking up all my memory. It pops up one after another after another, my PC is so slow that I can't even take the offline version of Antivirus (Bitdefender, Avira) from my Android to PC.
I tried switching off Windows Defender for good, no results. I know, all I need is to get the Antivirus in my Laptop. I even tried to kill "taskkiller.exe" by deleting from Command Prompt (Admin) by trying "del taskkiller.exe". It said,"Access Denied".
I have Windows 10,