ADP.ALEXA.51 is identified as a destructive program that launches various malicious programs onto the target PC. This Trojan is programmed to broaden the loopholes of the PC in order to open the backdoor to intrude remote hackers access the system silently. While running in the background, ADP.ALEXA.51 may download harmful contents or malware that can weaken the security and performance of the negotiated machine. On being installed, ADP.ALEXA.51 injects its codes to the windows process named as “svchost.exe” through which it can itself as the system reboots. ADP.ALEXA.51 removal is very important.