I agree with kornyedison, naa na sa registry sa mga startup entries. If you don't know how to search for it in the registry, I'll give you a hint. It's usually located in the RUN/RUNONCE or services entries.
Usually, hassle kaayo if mag.search ka sa registry dugay. Try using
AutoRuns, it let's you see all the running programs during startup. Just uncheck the entry once found to prevent it from running again. Though I recommend that you reboot in SAFE MODE and COMMAND PROMPT only from there you can execute
AutoRuns the uncheck that pestilence.
see screen shot below: