I recently noticed that I had unusually high memory usage and checked task manager to find a process called Ctfhost.exe running with description "Microsoft operating system" this is not normal for my machine so I killed the process and investigated to find that the process was running from "C:\Users\Ciaran\AppData\Roaming\AVAST Software" directory. I looked up the process and could not find much information on it except that it was a malicious process. I also found a scheduled task to run it at login of any user. Has my install been hijacked.
I am running windows 7 x64 with avast premier.