The ThreatExpert report for hvex.exe can be found here:
http://www.threatexpert.com/report.aspx?md5=75049...a68cd607615ff12095
If you've unselected it from startup, checked for the log file and keep trying to use Unlocker and remove the exe, you should be fine for now.
Like I suggested before,
Anti-Malware should remove this for you if you're unable to do it manually.