Cannot Find Rundll32.exe Error Message

• 1). Search your drives and locate a copy of the file "Rundll32.exe" if you are receiving the error message, "Windows cannot find C:\Windows\Rundll32.exe. Make sure you typed the name correctly and try again." A copy of "Rundll32.exe" is likely found in the folder "C:/Windows/ServicePackFiles/i386."
  
  
• 2). Right-click the file and choose "Copy."
  
  
• 3). Navigate to the folder "C:/Windows/System32." Right-click in the folder and choose "Paste." If the file already exists, choose to overwrite it; it may have been corrupted.
  
  
• 4). Restart the computer.
  
  

Illegal Operation Error Message

• 1). Click "Details" if you've received the error message, "Rundll32--This program has performed an illegal operation and will be shut down." The message reports a "General Protection Fault" in module "MMSYSTEM.DLL."
  
  
• 2). Open "Notepad," or any text editor, and navigate to "C:/Windows/system.ini."
  
  
• 3). Add the line "drivers=mmsystem.dll" (no quotes), and save the file.
  
  
• 4). Restart the computer.
  
  

Error Message at Program Start Up

• 1). Reinstall a recently removed program if you receive the error message, "Error loading C:/Windows/System/filename.dll" when starting a program. If you have uninstalled a program incorrectly, a shared "dll" file may have been removed.
  
  
• 2). Open "Control Panel" and click "Add/Remove Programs."
  
  
• 3). Locate the program and click "Remove." During the process, a message may appear informing you of a shared file. Choose the option to keep the file.
  
  
• 4). Restart the Computer.
  
  

Error Message at Computer Start Up

• 1). Click "Start" > "Run" and type "msconfig" (no quotes) in the box if you receive the error message, "Error loading C:/Windows/System/filename.dll" when your computer boots up.
  
  
• 2). Click on the "Startup" tab, then choose "Disable All."
  
  
• 3). Restart the computer. If the error message does not occur, then the error is caused by a program in the "Startup" menu.
  
  
• 4). Repeat Step 1, and click the "Startup" tab. Click the first program's box to place a check mark.
  
  
• 5). Restart the computer. If the error does not occur, repeat Steps 4 and 5, adding checked programs until the error returns, isolating the program causing the error.
  
  
• 6). Reinstall, uninstall or leave that program off the start menu.
  
  
• 7). Restart the computer.