I'm having a problem with VMware and the CS50 appliance.

I don't have anything fancy, like Fusion - just VMware Player 6.0.1 build-1379776. My computer runs Windows 7 Home Premium.

The player itself works fine but when I open the appliance file it shows the message, "Error while powering on: Internal error" as shown in the image below. How can I fix this error?

VMware Player Failure

  • I don't use VMware Player anymore, but when I was using it, I got this very same error and I simply restarted my PC to fix it. I honestly didn't search for any other solutions, so there might be one out there other than restarting your PC, but until you find it, you may try restarting your PC and try again!
    – kzidane
    Commented Jun 23, 2014 at 10:42
  • If @Kareem's suggestion works for you, please let us know/answer the question with that solution.
    – Air
    Commented Jun 23, 2014 at 16:33
  • I answered already... Deleted it though. Kind of annoying. Anyway, @Kareem's solution worked! Thanks for helping!
    – ChiCubed
    Commented Jul 2, 2014 at 11:13
  • I'm having the same problem! I have already restarted my laptop twice, but it's not working anyway. Does anyone know any further method to fix this?
    – user2284
    Commented Aug 25, 2014 at 20:57

5 Answers 5


I started the VMware Player in Administrator Mode and it worked.

  • Helps in my case with Suse vmaware
    – olly
    Commented Nov 15, 2014 at 7:58
  • same for me. Actually, i did it twice and solved the problem.
    – user3100
    Commented Nov 25, 2014 at 18:45

I restarted my computer and it worked!

  • I am now having the exact same problem. The appliance ran fine yesterday, but continues to give me an Internal Error every time I've tried today, even after rebooting my computer. If anyone has any other ideas on how to solve this, advice would be appreciated.
    – Starshadow
    Commented Jul 1, 2014 at 23:23
  • Starshadow, I tried again the next day. It didn't work, even after rebooting the computer. Maybe leave off for a couple of hours, then try again?
    – ChiCubed
    Commented Jul 7, 2014 at 4:06
  • I actually ended up having to to a repair on the VMware Player - I've had to do it twice now. So you may need to do that (and keep the download file because it may be necessary to do it often until you get finished with the course). Very frustrating.
    – Starshadow
    Commented Jul 7, 2014 at 15:19
  • @Starshadow Can you post the details of how to "do a repair on the VMware Player" as a separate answer? That way it is easier for people to find, and they can vote it up if it works for them.
    – Air
    Commented Sep 12, 2014 at 23:15
  • 1
    @Starshadow: Could you please tell how to do a repair. I find VMWare to be brittle and crashes routinely, and I find no tools for recovery or repair! Commented Mar 5, 2015 at 0:31

You can follow:

Start -> Services.msc -> VMWare Authorization -> Click Start

  • This assumes it's not already running--a bad assumption. And restarting doesn't help me either. Commented Mar 5, 2015 at 0:29

Starting up the Vmware application in administrator mode solves the problem . So try exiting and start it up in administrator mode


In my case, my computer has a power cut off probably exactly when the virtual machine saved the .vmx file, so I have one .vmx~ and one corrupted .vmx file. Everything I need to change the .vmx~ to .vmx and delete .vmem and .vmss because previously I suspended the machine.

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