I recommend you UnHackMe - Ultimate Malware Killer for fast malware removal:
Free Download Fully Functional 30-day Trial. No credit card is required.
Reviews. EULA. Privacy Policy. Uninstall.
The program a_friend.exe is used for the hidden penetration into PC and its remote administration.
UnHackMe is recommended as a reliable program for solving the problem with a_friend.exe.
Download for free: http://www.unhackme.com