pchealth.exe is a process which is registered as the W32.Cone worm. This virus is distributed via the Internet through e-mail and comes in the form of an e-mail message, anticipating the opening of its hostile attachment.
The worm has its own SMTP engine which means it gathers E-mails from a local computer and re-distributes itself. In worst cases this worm can allow attackers to access your computer, stealing passwords and personal data.
This process is a security risk and should be removed from your system. Please see additional details regarding this process.