It is very likely that stealth.injector.exe is spyware, a virus, or malware of some type. It's possible that your system's security is being compromised by this program. Please scan your hard drive immediately to avoid any further damage.

stealth.injector and it's associated process, PE_THEALS.A Worm, are known to be a type of malware. Since adware and legitimate files can have the same names, it is important that you backup your system before removing files indiscriminately.

For a quick and Free Spyware and Virus Scan, click here.

Since stealth.injector.exe was discovered on your system, there's probably more adware or viruses you haven't discovered. Scanning your system for free is the best way to avoid major problems in the future.