Win32.BloodKnife is a backdoor program that also has Trojan abilities.  It can gain unauthorized access to your system either through an e-mail, file sharing program or through Relay Chat.  It will open a backdoor that will allow a hacker to enter and the hacker has the ability to run your computer from a remote location.

Related Files:
N/A

Recommended Action:
Remove at Once

AKA:
BackDoor.BloodKnife
Backdoor.Win32.BloodKnife.a
Mal/EncPk-AW
Packed.Win32.PolyCrypt.b
New Malware.bl
Backdoor.Win32.BloodKnife.a
TR/PCK.PolyCrypt.B.841

Manual Removal:
If you want to remove Win32.BloodKnife manually, you will have to kill all of the running processes.  You will then have to search for and eradicate all of the related files in your Windows registries.  Manual removal, if not done correctly, puts your PC at risk of damage or worse yet, inoperability.
To safely and effectively remove Win32.BloodKnife, you should invest in SpyZooka.  SpyZooka is a trusted spyware remover that can clear all spyware from your system permanently.