Download and run Malwarebytes. Once you're done and rebooted AND you're still seeing weird issues, download ComboFix and run that as well.
bsitko has released 4 files
|Quest for Dorinthia: Special Edition||D-Mod, Epic||9.2||April 18th, 2018|
|Quest for Dorinthia III - Nymera's Quest||D-Mod, Demo||6.0||March 3rd, 2014|
|Quest for Dorinthia 2: The Island Revenge||D-Mod, Epic||9.4||July 3rd, 2012|
|Quest for Dorinthia (The)||D-Mod, Epic||8.4||March 26th, 2006|