How to Fix Virtial Box DLL Errors Windows 8, 8.1, 7, XP, Vista

VBoxC.dll is a type of DLL file associated with Oracle VM VirtualBox developed by Oracle Corporation for the Windows Operating System. The latest known version of VBoxC.dll is 4.2.18.88780, which was produced for Windows. This DLL file carries a popularity rating of 1 stars and a security rating of “UNKNOWN”.


  1. What Are DLL Files?

  2. Why do these DLL errors occur ?

  3. Most common seen DLL errors are :

  4. How to fix dll errors

  5. 1.Register VBoxC.dll Using Microsoft Register Server

  6. 2.Remove or Restore VBoxC.dll from the Windows Recycle Bin

  7.  3.Use System Restore (Windows XP, Vista, 7, and 8):

  8. 4.Install All Available Windows Updates

  9. 5.Update PC drivers

  10. 6.Run Windows System File Checker (“sfc /scannow”)

  11. 7.Perform a Reinstallation of Windows

What Are DLL Files?

DLL (dynamic link library) files such as VBoxC.dll are small programs, similar to EXE (“executable”) files, which allow multiple software programs to share the same functionality (eg. printing).

For example, let’s say you are running Windows and editing a document in Microsoft Word. The DLL file that controls printing does not need to load unless it’s function is needed – eg. you decide to print your document. When you select “Print”, Microsoft Word calls the printer DLL file, and it is loaded into memory (RAM) at that time. If you want to print a document in another program, Adobe Acrobat for example, that same printer DLL file will be used as well.

Why do these DLL errors occur ?

Because they are shared files, DLL files exist outside of the software application itself. Although this provides many benefits for software developers, this separation also provides an opportunity for problems to occur.

Quite simply, if Windows cannot properly load your VBoxC.dll file, you will encounter an error message. Please see “Causes of VBoxC.dll Errors” below for more information.

DLL error messages can appear during program installation, while a VBoxC.dll-related software program (eg. Oracle VM VirtualBox) is running, during Windows startup or shutdown, or even during the installation of the Windows operating system. Keeping track of when and where your VBoxC.dll error occurs is a critical piece of information in troubleshooting the problem.

Most common seen DLL errors are :

  1. “VBoxC.dll not found.”

  2. “The file VBoxC.dll is missing.”

  3. “VBoxC.dll Access Violation.”

  4. “Cannot register VBoxC.dll.”

  5. “Cannot find C:WindowsSystem32VBoxC.dll.”

  6. “Cannot start Oracle VM VirtualBox. A required component is missing: VBoxC.dll. Please install Oracle VM VirtualBox again.”

  7. “This application failed to start because VBoxC.dll was not found. Re-installing the application may fix this problem.”

How to fix dll errors

1.Register VBoxC.dll Using Microsoft Register Server

In some cases your DLL file may not register properly, and as a result, will provide a “VBoxC.dll not registered” error. Fortunately, you can use a built-in utility called “Microsoft Register Server” (regsvr32.exe) to re-register your VBoxC.dll file.

  1. Click the Start button.

  2. Type “command” in the search box

  3. A black box will open with a blinking cursor.

  4. Type the following command: regsvr32 /u VBoxC.dll.

  5. Hit ENTER. This will UN-REGISTER your file.

  6. Type the following command: regsvr32 /i VBoxC.dll.

  7. Hit ENTER. This will RE-REGISTER your file.

  8. Close the command prompt window.

  9. Re-start the program associated with VBoxC.dll error.

2.Remove or Restore VBoxC.dll from the Windows Recycle Bin

  1. If you find VBoxC.dll in recycle bin then and move it to the following directory

  2. Windows 95/98/Me = C:WindowsSystem32

  3. Windows NT/2000 = C:WindowsSystem32

  4. Windows XP, Vista, 7, 8 = C:WindowsSystem32

  5. 64-bit Windows = C:WindowsSystem32

  6. After moving your VBoxC.dll file, restart your computer.

3.Use System Restore (Windows XP, Vista, 7, and 8):

Windows System Restore allows you to “go back in time” with your PC to help fix your VBoxC.dll problems.

Steps to use system restore

  1. Click the Start button.

  2. In the search box, type “System Restore” and hit ENTER.

  3. In the results, click System Restore.

  4. Enter any administrator passwords (if prompted).

  5. Follow the steps in the Wizard to choose a restore point.