1) Try out these tools Malwarebyte, Spyware-Search and Destroy and Avast.
2) Go to your start menu, type Msconfig in the search field, go to the startup tab and under the start up item take notice of any item that has a reference to OTL.exe and disable it.
3) Go to your start up folder and make sure the OTL.exe file is not there, C:\Users\<userID>\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup
4) Check the following key in your registry, and make sure it's not there.
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
5) If none of the above methods work, try Hijackthis