[Chayan Manna]

Originally Posted by lolaya

pzlib = bugs in cancel installing ..

You can end the "pZLib.exe" task by a comand after clicking on cancel button, like this :

var
  ResultCode: Integer;
begin
    Exec(ExpandConstant('{sys}\taskkill.exe'), ' /F /IM pZLib.exe', '', SW_HIDE, ewWaitUntilTerminated, ResultCode);
end;

Or you can use cls-pzlib.dll