Failed to create the virtual box com object

I recently tried to rum an android emulator but while installing the emulator I got a message that Ram is in heavy use and then I remembered that I have a virtual OS. I didn't install the emulator after that but now I am getting the following error on opening my vmbox :

Failed to create the VirtualBox COM object.

The application will now terminate.

Class not registered

.

Component: Interface: {00000000-0000-0000-0000-000000000000} Callee RC: REGDB_E_CLASSNOTREG (0x80040154)