I recommend you UnHackMe - Ultimate Malware Killer for fast malware removal:
Free Download Fully Functional 30-day Trial. No credit card is required.
Reviews. EULA. Privacy Policy. Uninstall.
The file YahooAuth2.dll is defined as hazardous by our team.
The file YahooAuth2.dll must be deleted from the system immediately. Kill the file YahooAuth2.dll and remove YahooAuth2.dll from Windows startup.